A direct frequency synthesis frequency converter

Abstract

The application discloses a direct frequency synthesis frequency converter, which is used for solving the problem of how to obtain optimal phase noise through a single programmable frequency divider, and comprises a frequency mixing and frequency dividing circuit and a control circuit; the frequency mixing and frequency dividing circuit comprises a frequency divider circuit and a frequency mixer circuit; the application utilizes a programmable FPGA to control internal registers of an AD9516 through an SPI port, configures internal channel frequency divider values of the AD9516, realizes multiple frequency dividing functions, and the FPGA has a programmable function and cooperates with other modules of a radar to realize frequency agility controlled by a terminal program; an external clock of 1.2 GHz is used as an input clock source of distribution, and an internal VCO does not need to work. The AD9516 provides three level selections of LVPECL, LVDS and CMOS, and different frequency words are used to realize safe shutdown and value change control.

Description

Technical Field

[0001] This invention relates to the field of circuit design, specifically to a direct frequency synthesis inverter. Background Technology

[0002] In the field of radar applications, radar systems have gradually evolved from traditional conventional radars, which primarily observe target azimuth and intensity, to fully coherent radar systems capable of accurately calculating target speed and trajectory, performing multi-channel data processing, and avoiding interference. To achieve these functions, a high-performance radar clock system (frequency source) is essential. This system provides the reference clock required by each subsystem. For example, the electromagnetic waves emitted during radar detection require high spectral stability (phase jitter and phase noise). The spectral stability of its reference clock is crucial for complex detection and anti-interference scenarios, necessitating the use of multi-pulse frequency agility and multi-frequency hopping. In this process, the radar clock system provides a reference source for all subsystems, ensuring spectral stability while achieving stability and reliability.

[0003] There are various methods to provide multiple clock signals, such as DDS and phase-locked loops. In applications requiring high spectral stability, phase noise can be used to measure the performance of the frequency reference source.

[0004] If a PLL is used to implement frequency conversion, the phase noise F(all) within the loop bandwidth has the following formula:

[0005] F(all)=F(1)+10logf(ref)+2010logN

[0006] F(1) is the normalized noise unit dB of the phase detector, f(ref) is the phase detection frequency, N is the division ratio, and F(1) + 10logf(ref) is the noise of the phase detector at the phase detector frequency. The higher the frequency, the worse the phase noise; the larger the division ratio N, the better the phase noise. Since N is a PLL circuit...

[0007] Since it is a programmable frequency divider, it is conceivable that if the first two factors in the formula are eliminated, the optimal phase noise can be obtained by controlling a programmable frequency divider alone. Summary of the Invention

[0008] The purpose of this invention is to solve the problem of how to obtain the optimal phase noise through a programmable frequency divider alone, and to propose a direct frequency synthesis frequency converter.

[0009] The objective of this invention can be achieved through the following technical solution: a direct frequency synthesis inverter, comprising a frequency divider circuit and a control circuit; the frequency divider circuit comprises a frequency divider circuit and a frequency mixer circuit;

[0010] The frequency divider circuit is used to provide multiple outputs and clock distribution; the mixer circuit is used to achieve frequency synthesis through a broadband passive high-isolation multiplexer; the control circuit is used to provide serial control commands to the frequency divider circuit; wherein, the control circuit includes the digital circuit of the FPGA.

[0011] Furthermore, the frequency divider circuit includes a clock generator N29, four independent LVPECL clock outputs, and four LVDS clock outputs. Pin 1 of clock generator N29 is connected in parallel with one end of capacitor C143 and then connected to 3.3V; the other end of capacitor C143 is grounded. Pins 11 and 12 of clock generator N29 are connected in parallel with one end of capacitor C153 and then connected to 3.3V; the other end of capacitor C153 is grounded. Pin 13 of clock generator N29 is connected to one end of capacitor C155, and pin 14 of clock generator N29 is connected to one end of capacitor C156. The other ends of capacitors C155 and C156 are respectively connected to terminals 1 and 2 of transmission line transformer N33. Terminal 3 of transmission line transformer N33 is connected to pin 3 of power divider W3, and terminal 4 of transmission line transformer N33 is grounded. Pins 1 and 2 of power divider W3 are connected in parallel and then grounded. Pin 4 of power divider W3 is connected in parallel with one end of resistor R173 and then connected to one end of resistor R166. Pin 5 of power divider W3 is grounded. Pin 6 of power divider W3 is connected to pin 4 of power divider W2. Pins 1 and 2 of power divider W2 are connected in parallel and then grounded. Pin 3 of power divider W2 is connected in parallel with one end of resistor R148 and then to one end of resistor R144. Pin 5 of power divider W2 is grounded. The other end of resistor R148 is connected in parallel with one end of resistor R149 and then grounded. The other end of resistor R149 is connected in parallel with the other end of resistor R144 and then connected to capacitor C. One end of capacitor C170 is connected to one end of amplifier N34. The other end of amplifier N34 is connected in parallel with one end of capacitor C171 and then connected to one end of inductor L26. The other end of inductor L26 is connected in parallel with the positive terminal of capacitors C164 and C163, the positive terminal of polarized capacitor C162, one end of resistor R135, and one end of resistor R138 and then connected to one end of resistor R141. The other end of resistor R141 is connected in parallel with the other ends of resistors R138 and R135 and then connected to 8V. The other end of capacitor C171 is connected in parallel with one end of resistor R150 and then connected to one end of resistor R145. The other end of resistor R145 is connected in parallel with one end of resistor R151 and then connected to pin 3 of power divider W4. The other end of resistor R150 is connected in parallel with the other end of resistor R151 and then grounded. Pin 1 of power divider W4 is connected in parallel with one end of resistor R16 and then connected to one end of capacitor C128. The other end of capacitor C128 is connected to pin 5 of detector D1. Pin 6 of detector D1 is connected in parallel with the positive terminal of polarized capacitor C120 and then connected to 5V. The negative terminal of polarized capacitor C120 is grounded. Pin 4 of detector D1 is connected in parallel with the other end of resistor R16 and then grounded. Pin 2 of power divider W4 is connected in parallel with one end of resistor R155 and then connected to one end of resistor R161. The other end of resistor R161 is connected in parallel with the other end of resistor R164 and then connected to one end of filter Z12. The other end of resistor R155 is connected in parallel with one end of resistor R164 and then grounded.The other end of resistor R166 is connected in parallel with one end of resistor R174 and then connected to one end of capacitor C188. The other end of resistor R174 is connected in parallel with the other end of resistor R173 and then grounded. The other end of capacitor C188 is connected to one end of amplifier N39. The other end of amplifier N39 is connected in parallel with one end of capacitor C189 and then connected to one end of inductor L30. The other end of inductor L30 is connected in parallel with one end of capacitor C183, one end of capacitor C182, the positive terminal of polarized capacitor C181, one end of resistor R153, and one end of resistor R154 and then connected to one end of resistor R157. The other end of resistor R157 is connected in parallel with the other ends of resistor R154 and resistor R153 and then connected to 8V. The other end of capacitor C189 is connected in parallel with one end of resistor R165 and then connected to resistor R162. The other end of resistor R165 is connected in parallel with one end of resistor R163 and then connected to the power divider. Pin 3 of power divider W5 is connected to one end of resistor R163 and one end of resistor R162, then grounded. Pin 2 of power divider W5 is connected to one end of resistor R181, then to one end of resistor R184. The other end of resistor R184 is connected to one end of resistor R187, then to one end of filter Z13. The other end of resistor R187 is connected to the other end of resistor R181, then grounded. Pin 1 of power divider W5 is connected to one end of resistor R182, then to one end of capacitor C203. The other end of resistor R182 is grounded. The other end of capacitor C203 is connected to pin 5 of detector D6. Pins 2 and 4 of detector D6 are grounded. Pin 3 of detector D6 is connected to one end of capacitor C214. The other end of capacitor C214 is connected to 5V. Pin 6 of detector D6 is connected to one end of polarized capacitor C202, then to 5V. The other end of polarized capacitor C202 is grounded.

[0012] Furthermore, pin 24 of clock generator N29 is connected to one end of resistor R146, and the other end of resistor R146 is connected to 3.3V. Pin 27 of clock generator N29 is connected in parallel with one end of capacitor C166 and then connected to 3.3V. The other end of capacitor C166 is grounded. Pin 28 of clock generator N29 is connected in parallel with one end of resistor R156 and then connected to one end of capacitor C198. Pin 29 of clock generator N29 is connected in parallel with one end of resistor R160 and then connected to one end of capacitor C190. The other end of capacitor C198 and capacitor C190... The other end is connected to terminals 1 and 2 of transmission line transformer N41. Terminal 3 of transmission line transformer N41 is grounded. Terminal 4 of transmission line transformer N41 is connected to one end of capacitor C207. The other end of capacitor C207 is connected to one end of amplifier N46. The other end of amplifier N46 is connected to one end of inductor L34. The other end of inductor L34 is connected in parallel with one end of capacitor C208 and then connected to one end of inductor L3. The other end of inductor L35 is connected to one end of capacitor C212, one end of capacitor C211, the positive terminal of polarized capacitor C120, and resistor R1. One end of resistor R190 is connected in parallel with one end of resistor R191, and then connected to one end of resistor R192. The other ends of resistor R192, the other ends of resistor R191, and the other ends of resistor R190 are connected in parallel and then connected to 8V. The other end of capacitor C212, the other end of capacitor C211, and the negative terminal of polarized capacitor C120 are connected in parallel and then grounded. The other end of capacitor C208 is connected to pin 1 of coupler N45. Pin 2 of coupler N45 is grounded. Pin 3 of coupler N45 is connected in parallel with one end of resistor R197 and then connected to pin 5 of detector D7. The other end of resistor R197... One end is grounded. Pin 6 of coupler N45 is connected in parallel with one end of resistor R195 and then connected to one end of resistor R196. The other end of resistor R196 is connected in parallel with one end of resistor R194 and then connected to one end of filter Z14. The other end of resistor R194 is connected in parallel with the other end of resistor R195 and then grounded. Pin 2 of detector D7 is grounded. Pin 3 of detector D7 is connected to one end of capacitor C213. The other end of capacitor C213 is connected to 5V. Pin 6 of capacitor C213 is connected in parallel with the positive terminal of capacitor C209 and then connected to 5V. The negative terminal of capacitor C209 is grounded.

[0013] Furthermore, pins 30 and 31 of the clock generator N29 are connected in parallel with one end of capacitor C165 and then connected to one end of capacitor C172. The other ends of capacitor C172 and capacitor C165 are both grounded. Pin 33 of the clock generator N29 is connected to one end of capacitor C187, and pin 34 of the clock generator N29 is connected to one end of capacitor C194. The other end of capacitor C187 is connected in parallel with one end of resistor R178 and then connected to terminal 2 of transmission line transformer N42. The other end of capacitor C194 is connected in parallel with one end of resistor R179 and then connected to terminal 1 of transmission line transformer N42. The other end of resistor R179 is connected in parallel with the other end of resistor R178 and then grounded. Terminal 3 of transmission line transformer N42 is grounded. Terminal 4 of transmission line transformer N42 is connected to one end of capacitor C205. The other end of capacitor C205 is connected to one end of amplifier N44. The other end of amplifier N44 is connected in parallel with one end of capacitor C199 and then connected to one end of inductor L31. The other end of inductor L31 is connected in parallel with one end of capacitor C197, one end of capacitor C196, the positive terminal of capacitor C195, and one end of resistor R167 and then connected to one end of resistor R169. The other end of resistor R169 is connected in parallel with the other end of resistor R167 and then grounded. The negative terminal of capacitor C195, the other end of capacitor C196, and the other end of capacitor C197 are connected in parallel and then grounded. The other end of resistor 9 is connected in parallel with one end of resistor R185, and then connected to one end of resistor R180. The other end of resistor R180 is connected in parallel with one end of resistor R186, and then connected to one end of amplifier N43. The other end of resistor R186 is connected in parallel with the other end of resistor R186 and then grounded. The other end of amplifier N43 is connected to one end of inductor L33. The other end of inductor L33 is connected in parallel with one end of inductor L32 and then connected to one end of capacitor C200. The other end of inductor L32 is connected in parallel with one end of capacitor C193, one end of capacitor C192, the positive terminal of capacitor C191, one end of resistor R168, and one end of resistor R170, and then connected to one end of resistor R172. The other end of resistor R172 is connected to resistor R172. The other end of R170 and the other end of resistor R168 are connected in parallel to 8V; the other end of capacitor C200 is connected to pin 2 of coupler N40, pin 1 of coupler N40 is grounded, pin 3 of coupler N40 is connected in parallel to one end of resistor R183 and then to one end of capacitor C204, the other end of resistor R183 is grounded, pin 5 of coupler N40 is grounded, pin 6 of coupler N40 is connected in parallel to one end of resistor R189 and then to one end of resistor R193, the other end of resistor R193 is connected in parallel to one end of resistor R188 and one end of capacitor C219 and then to one end of inductor L41, the other end of resistor R188 and the other end of resistor R189 are connected in parallel and then to ground;The other end of inductor L41 is connected in parallel with one end of capacitor C218 and then connected to one end of inductor L40. The other end of inductor L40 is connected in parallel with the other end of capacitor C217 and then connected to one end of inductor L39. The other end of inductor L39 is connected in parallel with one end of capacitor C216 and then connected to one end of inductor L36. The other end of inductor L36 is connected to one end of capacitor C215. The other end of capacitor C215 is connected in parallel with the other ends of capacitors C216, C217, C218, and C219 and then grounded. The other end of capacitor C204 is connected to pin 5 of detector D5. Pins 2 and 4 of detector D5 are grounded. Pin 3 of detector D5 is connected to one end of capacitor C206. The other end of capacitor C206 is connected to 5V. Pin 6 of detector D5 is connected in parallel with the positive terminal of polarized capacitor C201 and then connected to 5V. The negative terminal of polarized capacitor C201 is grounded.

[0014] Furthermore, pin 35 of clock generator N29 is connected in parallel with one end of resistor R13 and then connected to one end of capacitor C167; pin 36 of clock generator N29 is connected in parallel with one end of resistor R132 and then connected to one end of capacitor C168; the other end of capacitor C167 is connected to terminal 2 of transmission line transformer N36; the other end of capacitor C168 is connected to terminal 1 of transmission line transformer N36; terminal 3 of transmission line transformer N36 is grounded; terminal 4 of transmission line transformer N36 is connected to one end of capacitor C185; the other end of capacitor C185 is connected to one end of amplifier N37; amplifier N3... The other end of capacitor C179 is connected in parallel with the other end of capacitor C179 and then connected to one end of inductor L37. The other end of inductor L37 is connected in parallel with one end of capacitor C178, one end of capacitor C177, the positive terminal of polarized capacitor C173, and one end of resistor R140 and then connected to one end of resistor R139. The other end of resistor R139 is connected in parallel with the other end of resistor R140 and then connected to 8V. The other end of capacitor C179 is connected in parallel with one end of resistor R158 and then connected to one end of resistor R152. The other end of resistor R152 is connected in parallel with one end of resistor R159 and then connected to one end of amplifier N38. The other end of resistor R158 is connected in parallel with resistor R15... The other end of 9 is connected in parallel to ground. The other end of amplifier N38 is connected to one end of inductor L29. The other end of inductor L29 is connected in parallel to one end of inductor L28 and then connected to one end of capacitor C180. The other end of capacitor C180 is connected to pin 1 of coupler N35. The other end of inductor L28 is connected in parallel to one end of capacitor C176, one end of capacitor C175, the positive terminal of polarized capacitor C174, one end of resistor R142, and one end of resistor R143 and then connected to one end of resistor R147. The other end of resistor R147 is connected in parallel to the other ends of resistor R143 and resistor R142 and then connected to 8V. Capacitor C17 The other end of 6, the other end of capacitor C175, and the negative terminal of polarized capacitor C174 are connected in parallel and then grounded; pin 2 of coupler N35 is grounded, pin 3 of coupler N35 is connected in parallel with one end of resistor R171 and then connected to one end of capacitor C186, the other end of resistor R171 is grounded, pin 5 of coupler N35 is grounded, pin 6 of coupler N35 is connected to one end of resistor R137 and one end of resistor R133, the other end of resistor R133 is connected in parallel with one end of resistor R136 and one end of capacitor C161 and then connected to one end of inductor L25, the other end of resistor R136 is connected in parallel with one end of resistor R137 and then grounded;The other end of inductor L25 is connected in parallel with one end of capacitor C160 and then connected to one end of inductor L24. The other end of inductor L24 is connected in parallel with one end of capacitor C159 and then connected to one end of inductor L23. The other end of inductor L23 is connected in parallel with one end of capacitor C158 and then connected to one end of inductor L22. The other end of inductor L22 is connected to one end of capacitor C157. The other end of capacitor C157 is connected in parallel with the other ends of capacitors C158, C159, C160, and C161 and then grounded. The other end of capacitor C186 is connected to pin 5 of detector D4. Pins 2 and 4 of detector D4 are grounded. Pin 3 of detector D4 is connected to one end of capacitor C169. The other end of capacitor C169 is connected to 5V. Pin 6 of detector D4 is connected in parallel with the positive terminal of capacitor C184 and then connected to 5V. The negative terminal of polarized capacitor C184 is grounded.

[0015] Furthermore, pin 37 of clock generator N29 is connected in parallel with one end of capacitor C154 and then grounded; the other end of capacitor C154 is connected in parallel with pin 38 of clock generator N29 and then connected to 3.3V; pin 41 of clock generator N29 is connected in parallel with one end of capacitor C151 and then connected to 3.3V; the other end of capacitor C151 is grounded; pin 42 of clock generator N29 is connected to one end of resistor R127 and then connected to one end of capacitor C152; pin 43 of clock generator N29 is connected to one end of resistor R124 and then connected to... One end of capacitor C148, the other end of resistor R127, and the other end of resistor R124 are connected in parallel and then grounded; the other ends of capacitor C148 and capacitor C152 are connected to terminals 1 and 2 of transmission line transformer N31, respectively. Terminal 3 of transmission line transformer N31 is grounded. Terminal 4 of transmission line transformer N31 is connected in parallel with one end of resistor R130 and then connected to one end of resistor R125. The other end of resistor R125 is connected in parallel with one end of resistor R131 and then connected to one end of capacitor C149. The other end of resistor R131 is connected to... The other end of resistor R130 is connected in parallel to ground. The other end of capacitor C149 is connected to one end of amplifier N32. The other end of amplifier N32 is connected to one end of inductor L21. The other end of inductor L21 is connected in parallel with one end of capacitor C150 and then connected to one end of inductor L20. The other end of inductor L20 is connected in parallel with one end of capacitor C147, one end of capacitor C146, the positive terminal of polarized capacitor C145, one end of resistor R121, and one end of resistor R122 and then connected to one end of resistor R123. The other end of resistor R123 is connected to resistor R... The other end of capacitor C122 is connected in parallel with the other end of resistor R121 and then connected to 8V. The other end of capacitor C147 is connected in parallel with the other end of capacitor C146 and the other end of polarized capacitor C145 and then grounded. The other end of capacitor C150 is connected in parallel with one end of resistor R128 and then connected to one end of resistor R126. The other end of resistor R126 is connected in parallel with the other end of resistor R129 and then connected to one end of filter Z11. The other end of filter Z11 is connected to pin 3 of power divider W1. The other end of resistor R129 is connected in parallel with the other end of resistor R128 and then grounded.

[0016] Furthermore, the broadband passive device is a broadband LC filter.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This invention utilizes a programmable FPGA to control the internal registers of the AD9516 via the SPI port, configures the values ​​of the internal channel dividers of the AD9516, and realizes various frequency division functions. The FPGA has programmable functions and can work in conjunction with other radar modules to achieve frequency agility in terminal control. It uses a direct external clock of 1.2GHz as the allocated input clock source and does not require the operation of the internal VCO.

[0019] The AD9516 offers three level selection options: LVPECL, LVDS, and CMOS, with different frequency words used to achieve safety shutdown and numerical change control. Attached Figure Description

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the principle of the present invention;

[0022] Figure 2 This is a circuit diagram of the clock generator of the present invention;

[0023] Figure 3 This is a circuit diagram showing the connection of pin 13 of the clock generator of the present invention;

[0024] Figure 4 This is a circuit diagram showing the 28-pin connection of the clock generator of the present invention;

[0025] Figure 5 This is a circuit diagram showing the connection of pin 33 of the clock generator of the present invention;

[0026] Figure 6 This is a circuit diagram showing the connection of pin 35 of the clock generator of the present invention;

[0027] Figure 7 This is a circuit diagram showing the 42-pin connection of the clock generator of the present invention;

[0028] Figure 8 This is a circuit diagram showing the 52-pin connection of the clock generator of the present invention;

[0029] Figure 9 This is a circuit diagram showing the connection of filter Z9 in this invention;

[0030] Figure 10 This is a block diagram of the programmable frequency divider of the present invention;

[0031] Figure 11 This is an internal logic block diagram of the AD9516 of the present invention;

[0032] Figure 12 This is a schematic diagram of the direct frequency synthesis of the present invention. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1-12 As shown, a direct frequency synthesis inverter includes a frequency divider circuit and a control circuit; the frequency divider circuit includes a frequency divider circuit and a frequency mixer circuit.

[0035] The frequency divider circuit provides multiple outputs and clock distribution; the mixer circuit achieves frequency synthesis using a high-isolation multi-channel mixer with broadband passive devices; the control circuit provides serial control commands to the frequency divider circuit. The control circuit includes digital circuitry from the FPGA, and the frequency divider / mixer circuit includes a clock generator N29, four independent LVPECL clock outputs, and four LVDS clock outputs. Pin 1 of clock generator N29 is connected in parallel with one end of capacitor C143 to a 3.3V supply, and the other end of capacitor C143 is grounded. Pins 11 and 12 of clock generator N29 are connected in parallel with one end of capacitor C153 to a 3.3V supply, and the other end of capacitor C153 is grounded. Pin 13 of clock generator N29 is connected in parallel with... One end of capacitor C155 is connected to pin 14 of clock generator N29 and one end of capacitor C156; the other ends of capacitors C155 and C156 are connected to terminals 1 and 2 of transmission line transformer N33, respectively; terminal 3 of transmission line transformer N33 is connected to pin 3 of power divider W3; terminal 4 of transmission line transformer N33 is grounded; pins 1 and 2 of power divider W3 are connected in parallel and then grounded; pin 4 of power divider W3 is connected in parallel with one end of resistor R173 and then connected to one end of resistor R166; pin 5 of power divider W3 is grounded; pin 6 of power divider W3 is connected to pin 4 of power divider W2; pins 1 and 2 of power divider W2 are connected in parallel and then grounded; pin 3 of power divider W2 is connected to... One end of resistor R148 is connected in parallel to one end of resistor R144. Pin 5 of power divider W2 is grounded. The other end of resistor R148 is connected in parallel with one end of resistor R149 and then grounded. The other end of resistor R149 is connected in parallel with the other end of resistor R144 and then connected to one end of capacitor C170. The other end of capacitor C170 is connected to one end of amplifier N34. The other end of amplifier N34 is connected in parallel with one end of capacitor C171 and then connected to one end of inductor L26. The other end of inductor L26 is connected to the positive terminal of capacitors C164, C163, and polarized capacitor C162, one end of resistor R135, and one end of resistor R138 and then connected to one end of resistor R141. The other end of resistor R141 is connected to the other end of resistor R138. One end of capacitor C171 is connected in parallel with the other end of resistor R135 and then connected to 8V; the other end of capacitor C171 is connected in parallel with one end of resistor R150 and then connected to one end of resistor R145; the other end of resistor R145 is connected in parallel with one end of resistor R151 and then connected to pin 3 of power divider W4; the other end of resistor R150 is connected in parallel with the other end of resistor R151 and then grounded; pin 1 of power divider W4 is connected in parallel with one end of resistor R16 and then connected to one end of capacitor C128; the other end of capacitor C128 is connected to pin 5 of detector D1; pin 6 of detector D1 is connected in parallel with the positive terminal of polarized capacitor C120 and then connected to 5V; the negative terminal of polarized capacitor C120 is grounded; pin 4 of detector D1 is connected in parallel with the other end of resistor R16 and then grounded.Pin 2 of power divider W4 is connected in parallel with one end of resistor R155, then connected to one end of resistor R161. The other end of resistor R161 is connected in parallel with the other end of resistor R164, then connected to one end of filter Z12. The other end of resistor R155 is connected in parallel with one end of resistor R164 and then grounded. The other end of resistor R166 is connected in parallel with one end of resistor R174 and then connected to one end of capacitor C188. The other end of resistor R174 is connected in parallel with the other end of resistor R173 and then grounded. The other end of capacitor C188 is connected to amplifier... One end of amplifier N39 is connected, and the other end of amplifier N39 is connected in parallel with one end of capacitor C189, and then connected to one end of inductor L30. The other end of inductor L30 is connected in parallel with one end of capacitor C183, one end of capacitor C182, the positive terminal of polarized capacitor C181, one end of resistor R153, and one end of resistor R154, and then connected to one end of resistor R157. The other end of resistor R157 is connected in parallel with the other ends of resistor R154 and resistor R153, and then connected to 8V. The other end of capacitor C189 is connected to... One end of resistor R165 is connected in parallel to resistor R162. The other end of resistor R165 is connected in parallel with one end of resistor R163 and then connected to pin 3 of power divider W5. The other end of resistor R163 is connected in parallel with one end of resistor R162 and then grounded. Pin 2 of power divider W5 is connected in parallel with one end of resistor R181 and then connected to one end of resistor R184. The other end of resistor R184 is connected in parallel with one end of resistor R187 and then connected to one end of filter Z13. The other end of resistor R187 is connected in parallel with the other end of resistor R181. After connecting to ground, pin 1 of power divider W5 is connected in parallel with one end of resistor R182 and then connected to one end of capacitor C203. The other end of resistor R182 is grounded. The other end of capacitor C203 is connected to pin 5 of detector D6. Pins 2 and 4 of detector D6 are grounded. Pin 3 of detector D6 is connected to one end of capacitor C214. The other end of capacitor C214 is connected to 5V. Pin 6 of detector D6 is connected in parallel with one end of polarized capacitor C202 and then connected to 5V. The other end of polarized capacitor C202 is grounded.

[0036] Pin 24 of clock generator N29 is connected to one end of resistor R146, and the other end of resistor R146 is connected to 3.3V. Pin 27 of clock generator N29 is connected in parallel with one end of capacitor C166, and the other end of capacitor C166 is grounded. Pin 28 of clock generator N29 is connected in parallel with one end of resistor R156, and the other end of capacitor C198 is connected to one end of capacitor C198. Pin 29 of clock generator N29 is connected in parallel with one end of resistor R160, and the other end of capacitor C190 is connected to one end of capacitor C190. The other ends of capacitors C198 and C190 are respectively... Connect to terminals 1 and 2 of transmission line transformer N41. Terminal 3 of transmission line transformer N41 is grounded. Terminal 4 of transmission line transformer N41 is connected to one end of capacitor C207. The other end of capacitor C207 is connected to one end of amplifier N46. The other end of amplifier N46 is connected to one end of inductor L34. The other end of inductor L34 is connected in parallel with one end of capacitor C208 and then connected to one end of inductor L3. The other end of inductor L35 is connected to one end of capacitor C212, one end of capacitor C211, the positive terminal of polarized capacitor C120, and resistor R190. One end of resistor C200 is connected in parallel with one end of resistor R191 and then connected to one end of resistor R192. The other ends of resistor R192, R191, and R190 are connected in parallel and then connected to 8V. The other end of capacitor C212 is connected in parallel with the other end of capacitor C211 and the negative terminal of polarized capacitor C120 and then grounded. The other end of capacitor C208 is connected to pin 1 of coupler N45. Pin 2 of coupler N45 is grounded. Pin 3 of coupler N45 is connected in parallel with one end of resistor R197 and then connected to pin 5 of detector D7. The other end of resistor R197... The coupler is grounded. Pin 6 of the coupler N45 is connected in parallel with one end of resistor R195 and then connected to one end of resistor R196. The other end of resistor R196 is connected in parallel with one end of resistor R194 and then connected to one end of filter Z14. The other end of resistor R194 is connected in parallel with the other end of resistor R195 and then grounded. Pin 2 of the detector D7 is grounded. Pin 3 of the detector D7 is connected to one end of capacitor C213. The other end of capacitor C213 is connected to 5V. Pin 6 of capacitor C213 is connected in parallel with the positive terminal of capacitor C209 and then connected to 5V. The negative terminal of capacitor C209 is grounded.

[0037] Pins 30 and 31 of clock generator N29 are connected in parallel with one end of capacitor C165, and then connected to one end of capacitor C172. The other ends of capacitors C172 and C165 are both grounded. Pin 33 of clock generator N29 is connected to one end of capacitor C187, and pin 34 of clock generator N29 is connected to one end of capacitor C194. The other end of capacitor C187 is connected in parallel with one end of resistor R178 and then connected to terminal 2 of transmission line transformer N42. The other end of capacitor C194 is connected in parallel with one end of resistor R179 and then connected to terminal 1 of transmission line transformer N42. The other end of resistor R179 is connected in parallel with the other end of resistor R178 and then grounded. Terminal 3 of N42 is grounded. Terminal 4 of transmission line transformer N42 is connected to one end of capacitor C205. The other end of capacitor C205 is connected to one end of amplifier N44. The other end of amplifier N44 is connected in parallel with one end of capacitor C199 and then connected to one end of inductor L31. The other end of inductor L31 is connected in parallel with one end of capacitor C197, one end of capacitor C196, the positive terminal of capacitor C195, and one end of resistor R167 and then connected to one end of resistor R169. The other end of resistor R169 is connected in parallel with the other end of resistor R167 and then grounded. The negative terminal of capacitor C195, the other end of capacitor C196, and the other end of capacitor C197 are connected in parallel and then grounded. The other end of capacitor C199... One end of resistor R185 is connected in parallel to one end of resistor R180. The other end of resistor R180 is connected in parallel to one end of resistor R186 and then to one end of amplifier N43. The other end of resistor R186 is connected in parallel to the other end of resistor R186 and then grounded. The other end of amplifier N43 is connected to one end of inductor L33. The other end of inductor L33 is connected in parallel to one end of inductor L32 and then to one end of capacitor C200. The other end of inductor L32 is connected in parallel to one end of capacitor C193, one end of capacitor C192, the positive terminal of capacitor C191, one end of resistor R168, and one end of resistor R170 and then to one end of resistor R172. The other end of resistor R172 is connected to resistor R1... The other end of 70 is connected in parallel with the other end of resistor R168 and then connected to 8V; the other end of capacitor C200 is connected to pin 2 of coupler N40, pin 2 of coupler N40 is grounded; pin 3 of coupler N40 is connected in parallel with one end of resistor R183 and then connected to one end of capacitor C204; the other end of resistor R183 is grounded; pin 5 of coupler N40 is grounded; pin 6 of coupler N40 is connected in parallel with one end of resistor R189 and then connected to one end of resistor R193; the other end of resistor R193 is connected in parallel with one end of resistor R188 and one end of capacitor C219 and then connected to one end of inductor L41; the other end of resistor R188 and the other end of resistor R189 are connected in parallel and then grounded.The other end of inductor L41 is connected in parallel with one end of capacitor C218 and then connected to one end of inductor L40. The other end of inductor L40 is connected in parallel with the other end of capacitor C217 and then connected to one end of inductor L39. The other end of inductor L39 is connected in parallel with one end of capacitor C216 and then connected to one end of inductor L36. The other end of inductor L36 is connected to one end of capacitor C215. The other end of capacitor C215 is connected in parallel with the other ends of capacitors C216, C217, C218, and C219 and then grounded. The other end of capacitor C204 is connected to pin 5 of detector D5. Pins 2 and 4 of detector D5 are grounded. Pin 3 of detector D5 is connected to one end of capacitor C206. The other end of capacitor C206 is connected to 5V. Pin 6 of detector D5 is connected in parallel with the positive terminal of polarized capacitor C201 and then connected to 5V. The negative terminal of polarized capacitor C201 is grounded.

[0038] Pin 35 of clock generator N29 is connected in parallel with one end of resistor R13 and then connected to one end of capacitor C167. Pin 36 of clock generator N29 is connected in parallel with one end of resistor R132 and then connected to one end of capacitor C168. The other end of capacitor C167 is connected to terminal 2 of transmission line transformer N36, and the other end of capacitor C168 is connected to terminal 1 of transmission line transformer N36. Terminal 3 of transmission line transformer N36 is grounded. Terminal 4 of transmission line transformer N36 is connected to one end of capacitor C185, and the other end of capacitor C185 is connected to one end of amplifier N37. The other end of amplifier N37... The other end of capacitor C179 is connected in parallel to one end of inductor L37. The other end of inductor L37 is connected in parallel with one end of capacitor C178, one end of capacitor C177, the positive terminal of polarized capacitor C173, and one end of resistor R140, and then connected to one end of resistor R139. The other end of resistor R139 is connected in parallel with the other end of resistor R140 and then connected to 8V. The other end of capacitor C179 is connected in parallel with one end of resistor R158 and then connected to one end of resistor R152. The other end of resistor R152 is connected in parallel with one end of resistor R159 and then connected to one end of amplifier N38. The other end of resistor R158 is connected in parallel with the other end of resistor R159. After being connected in parallel, the other end of amplifier N38 is grounded. The other end of amplifier N38 is connected to one end of inductor L29. The other end of inductor L29 is connected in parallel with one end of inductor L28 and then connected to one end of capacitor C180. The other end of capacitor C180 is connected to pin 1 of coupler N35. The other end of inductor L28 is connected in parallel with one end of capacitor C176, one end of capacitor C175, the positive terminal of polarized capacitor C174, one end of resistor R142, and one end of resistor R143, and then connected to one end of resistor R147. The other end of resistor R147 is connected in parallel with the other ends of resistor R143 and resistor R142 and then connected to 8V. Capacitor C176... The other end, the other end of capacitor C175, and the negative terminal of polarized capacitor C174 are connected in parallel and then grounded; pin 2 of coupler N35 is grounded, pin 3 of coupler N35 is connected in parallel with one end of resistor R171 and then connected to one end of capacitor C186, the other end of resistor R171 is grounded, pin 5 of coupler N35 is grounded, pin 6 of coupler N35 is connected to one end of resistor R137 and one end of resistor R133, the other end of resistor R133 is connected in parallel with one end of resistor R136 and one end of capacitor C161 and then connected to one end of inductor L25, the other end of resistor R136 is connected in parallel with one end of resistor R137 and then grounded;The other end of inductor L25 is connected in parallel with one end of capacitor C160 and then connected to one end of inductor L24. The other end of inductor L24 is connected in parallel with one end of capacitor C159 and then connected to one end of inductor L23. The other end of inductor L23 is connected in parallel with one end of capacitor C158 and then connected to one end of inductor L22. The other end of inductor L22 is connected to one end of capacitor C157. The other end of capacitor C157 is connected in parallel with the other ends of capacitors C158, C159, C160, and C161 and then grounded. The other end of capacitor C186 is connected to pin 5 of detector D4. Pins 2 and 4 of detector D4 are grounded. Pin 3 of detector D4 is connected to one end of capacitor C169. The other end of capacitor C169 is connected to 5V. Pin 6 of detector D4 is connected in parallel with the positive terminal of capacitor C184 and then connected to 5V. The negative terminal of polarized capacitor C184 is grounded.

[0039] Pin 37 of clock generator N29 is connected in parallel with one end of capacitor C154 and then grounded. The other end of capacitor C154 is connected in parallel with pin 38 of clock generator N29 and then connected to 3.3V. Pin 41 of clock generator N29 is connected in parallel with one end of capacitor C151 and then connected to 3.3V. The other end of capacitor C151 is grounded. Pin 42 of clock generator N29 is connected to one end of resistor R127 and then connected to one end of capacitor C152. Pin 43 of clock generator N29 is connected to one end of resistor R124 and then connected to capacitor C148. One end of resistor R127 is connected to the other end of resistor R124 and then grounded; the other ends of capacitor C148 and capacitor C152 are connected to terminals 1 and 2 of transmission line transformer N31 respectively; terminal 3 of transmission line transformer N31 is grounded; terminal 4 of transmission line transformer N31 is connected to one end of resistor R130 and then to one end of resistor R125; the other end of resistor R125 is connected to one end of resistor R131 and then to one end of capacitor C149; the other end of resistor R131 and resistor R13... The other end of capacitor C149 is connected to ground after being connected in parallel. The other end of capacitor C149 is connected to one end of amplifier N32. The other end of amplifier N32 is connected to one end of inductor L21. The other end of inductor L21 is connected in parallel with one end of capacitor C150 and then connected to one end of inductor L20. The other end of inductor L20 is connected in parallel with one end of capacitor C147, one end of capacitor C146, the positive terminal of polarized capacitor C145, one end of resistor R121, and one end of resistor R122 and then connected to one end of resistor R123. The other end of resistor R123 is connected to resistor R12... The other end of capacitor C147 is connected in parallel with the other end of resistor R121 and then connected to 8V. The other end of capacitor C147 is connected in parallel with the other end of capacitor C146 and the other end of polarized capacitor C145 and then connected to ground. The other end of capacitor C150 is connected in parallel with one end of resistor R128 and then connected to one end of R126. The other end of resistor R126 is connected in parallel with the other end of resistor R129 and then connected to one end of filter Z11. The other end of filter Z11 is connected to pin 3 of power divider W1. The other end of resistor R129 is connected in parallel with the other end of resistor R128 and then connected to ground.

[0040] Pin 47 of clock generator N29 is connected in parallel with one end of resistor R120 and then connected to one end of capacitor C144. Pin 48 of clock generator N29 is connected in parallel with one end of resistor R117 and then connected to one end of capacitor C140. The other ends of capacitor C140 and capacitor C144 are connected to terminals 1 and 2 of transmission line transformer N28, respectively. Terminal 3 of transmission line transformer N28 is grounded. Terminal 4 of transmission line transformer N28 is connected to one end of capacitor C141. Pins 49, 50, and 51 of clock generator N29 are connected in parallel with one end of capacitor C138 and one end of capacitor C139, and then connected to 3.3V. The other ends of capacitors C138 and C139 are both grounded. Clock generator N29... Pin 52 of the clock generator N29 is connected in parallel with one end of resistor R15 and then connected to one end of capacitor C124. Pin 53 of the clock generator N29 is connected in parallel with one end of resistor R13 and then connected to one end of capacitor C119. The other ends of capacitor C119 and capacitor C124 are connected to terminals 1 and 2 of transmission line transformer N25, respectively. Terminal 3 of transmission line transformer N25 is grounded. Terminal 4 of transmission line transformer N25 is connected to one end of capacitor C131. The other end of capacitor C131 is connected to one end of amplifier N27. The other end of amplifier N27 is connected to one end of inductor L17. The other end of inductor L17 is connected in parallel with one end of capacitor C132 and then connected to one end of inductor L15. The other end of inductor L15 is connected to capacitor C124. One end of capacitor C127, one end of capacitor C126, the positive terminal of polarized capacitor C125, one end of resistor R8, and one end of resistor R10 are connected in parallel to one end of resistor R12. The other end of resistor R12 is connected in parallel with the other ends of resistor R10 and resistor R8, and then connected to 8V. The other end of capacitor C127, the other end of capacitor C126, and the negative terminal of polarized capacitor C125 are connected in parallel to ground. The other end of capacitor C132 is connected in parallel with the other end of resistor R21, and then connected to one end of resistor R19. The other end of resistor R19 is connected in parallel with resistor R22, and then connected to one end of filter Z8. The other end of resistor R22 is connected in parallel with the other end of resistor R21, and then ground. The other end of filter Z8 is connected to pin 6 of component ADEX-1. Pin 1 of ADEX-1 is grounded. Pins 4 and 5 of ADEX-1 are connected in parallel and then grounded. Pin 2 of ADEX-1 is connected in parallel with one end of resistor R17, then connected to one end of resistor R14. The other end of resistor R14 is connected in parallel with the other end of resistor R18, then connected to pin 1 of power divider W1. The other end of resistor R17 is connected in parallel with the other end of resistor R18 and then grounded. Pin 2 of power divider W1 is connected to one end of filter Z10. The other end of filter Z10 is connected in parallel with one end of resistor R119, then connected to one end of resistor R116. The other end of resistor R116 is connected in parallel with one end of resistor R118 and then connected to one end of capacitor C142. The other end of resistor R118 is connected in parallel with the other end of resistor R119 and then grounded.The other end of capacitor C142 is connected in parallel with one end of inductor L18, and then connected to one end of inductor L19. The other end of inductor L19 is connected to one end of amplifier N30. The other end of amplifier N30 is connected to the other end of capacitor C141. The other end of inductor L18 is connected in parallel with one end of capacitor C137, one end of capacitor C136, the positive terminal of polarized capacitor C135, one end of resistor R20, and one end of resistor R78, and then connected to one end of resistor R110. The other end of resistor R20 is connected in parallel with the other ends of resistor R78 and resistor R110, and then connected to 8V. The other end of capacitor C137 is connected in parallel with the other end of capacitor C136 and the negative terminal of polarized capacitor C135, and then grounded. Pin 3 of component ADEX-1 is connected to one end of capacitor C129. The other end of capacitor C129 is connected to one end of amplifier N26. The other end of amplifier N26... One end of inductor L16 is connected to one end of capacitor C130, and then connected to one end of inductor L14. The other end of inductor L14 is connected in parallel with one end of capacitor C123, one end of capacitor C122, the positive terminal of polarized capacitor C121, one end of resistor R7, and one end of resistor R9, and then connected to one end of resistor R11. The other end of resistor R11 is connected in parallel with the other ends of resistors R9 and R7, and then connected to 8V. The other end of capacitor C123 is connected in parallel with the other end of capacitor C122 and the negative terminal of polarized capacitor C121, and then grounded. The other end of capacitor C130 is connected in parallel with one end of resistor R155, and then connected to one end of resistor R111. The other end of resistor R111 is connected in parallel with one end of resistor R114, and then connected to one end of filter Z9. The other end of resistor R115 is connected in parallel with the other end of resistor R114, and then grounded.

[0041] The broadband passive device is a broadband LC filter;

[0042] FPGA-controlled AD9516 clock generator, such as Figure 1 The AD9516 chip integrates two reference inputs, a VCO clock up to 2.4GHz, a programmable control port, and 14 clock drivers, including outputs of 6 LVPECLs, LVDS (up to 4 channels), or CMOS (up to 8 channels). This invention utilizes a programmable FPGA to control the AD9516's internal registers via the SPI port, configuring the AD9516's internal channel divider values ​​to achieve various frequency division functions. The FPGA's programmable capabilities allow it to work collaboratively with other radar modules, enabling frequency agility controlled by the terminal program.

[0043] This invention uses a direct external clock of 1.2GHz (less than 1600MHz) as the allocated input clock source, eliminating the need for an internal VCO. The AD9516 provides three level selection options: LVPECL, LVDS, and CMOS, with different frequency words used to implement safety shutdown and numerical change control, as shown in Table 1. The LVPECL level divider calculation formula is: Dx = M + N + 2, which can achieve integer division from 2 to 32. The LVDS / CMOS level divider consists of two cascaded dividers.

[0044] The formula for calculating the frequency division value is:

[0045] Dx=(Nx.1+Mx.1+2) (Nx.2+Mx.2+2),

[0046] It can achieve frequency division by integer multiples up to 1024. Programmable parameters M and N make frequency output changes simple and flexible.

[0047] Table 1 AD9516 Programmable Frequency Control

[0048]

[0049] Multi-frequency direct frequency synthesis: Optimal phase noise can be obtained using a programmable frequency divider. To achieve multiple frequency points and meet requirements, frequency hopping in 10MHz steps from 60MHz to 160MHz is implemented. Figure 10 Principle block diagram, Figure 10 This function is achieved using only filters and power dividers; all filters are bandpass (BPF) filters, and the filter selection is based on... Figure 10 The frequency range marked in the block diagram is relatively easy to implement. In this block diagram, the front-end frequency signal is controlled by the programming logic to make its out6 output 20MHz, 30MHz, 40MHz, 50MHz, 60MHz and its out1 output 100MHz, 150MHz, 200MHz signals, as shown in Table 2. Under these two frequency output combinations, a frequency signal of 60-160MHz can be generated by frequency synthesis and frequency difference.

[0050] Table 2

[0051]

[0052] In the overall block diagram, because the bandpass filter (BPF) has a high out-of-band rejection (approximately 70dB or more), there is no need to use electronic or mechanical switching switches to switch the signals of each power splitter or combiner. This can eliminate the additional noise caused by switching to the greatest extent and simplify the layout. All other frequency conversion devices are analog devices. Theoretically, the system shown in the block diagram has no delay. The response time of the entire system depends on the response time of the serial control circuit. For example, in this example, an 18MHz FPGA clock is used, so the delay from the TTL command to the system response is approximately 1 / 18MHz ≈ 55ns, which can meet the timing conversion requirements of the radar system in pulse agility mode.

[0053] The internal logic block diagram of AD9516 is as follows: Figure 11 The program controls the frequency division up to 32*32. In this design patent, 1200MHz is selected as the frequency division clock for the chip. In order to obtain the frequency values ​​of LO and IF in Table 2, 1200MHz needs to be decomposed into 20MHz, 30MHz, 40MHz, 50MHz, 60MHz, 100MHz, 150MHz, and 200MHz.

[0054] like Figure 12 It accepts inputs of 1.2GHz and 100MHz, and through direct frequency synthesis, outputs 20MHz, 30MHz, 40MHz, 50MHz, 60MHz, 100MHz, 150MHz, and 200MHz in a time-division manner; the direct frequency synthesis also includes input power supply and external 6-bit TTL control; outputs BITE fault alarm;

[0055] In use, this invention employs a frequency divider circuit to provide multiple outputs and clock distribution; a mixer circuit to achieve frequency synthesis using a high-isolation, broadband passive multi-channel mixer; and a control circuit to provide serial control commands to the frequency divider circuit. The control circuit includes digital circuitry from an FPGA. Utilizing the programmable FPGA, the internal registers of the AD9516 are controlled via the SPI port to configure the values ​​of the internal channel frequency dividers, enabling various frequency division functions. The FPGA is programmable and works in conjunction with other radar modules, allowing for terminal program-controlled frequency agility. It uses a direct external clock of 1.2 GHz as the distributed input clock source, eliminating the need for an internal VCO. The AD9516 provides three level selection options: LVPECL, LVDS, and CMOS, with different frequency words used for safety shutdown and value change control.

[0056] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A direct frequency synthesis inverter, comprising a mixing and dividing circuit and a control circuit; characterized in that, The frequency divider circuit includes a frequency divider circuit and a frequency mixer circuit. The frequency divider circuit is used to provide multiple outputs and clock distribution; the mixer circuit is used to achieve frequency synthesis through a broadband passive high-isolation multiple mixer; the control circuit is used to provide serial control commands to the frequency divider circuit; the control circuit includes the digital circuit of the FPGA. The frequency divider / mixer circuit includes a clock generator N29, four independent LVPECL clock outputs, and four LVDS clock outputs. Pin 1 of clock generator N29 is connected in parallel with one end of capacitor C143 and then connected to 3.3V; the other end of capacitor C143 is grounded. Pins 11 and 12 of clock generator N29 are connected in parallel with one end of capacitor C153 and then connected to 3.3V; the other end of capacitor C153 is grounded. Pin 13 of clock generator N29 is connected to one end of capacitor C155, and pin 14 of clock generator N29 is connected to one end of capacitor C156. The other end of capacitor C155 is connected to terminal 1 of transmission line transformer N33, and the other end of capacitor C156 is connected to terminal 2 of transmission line transformer N33. Connect the 3rd terminal of transmission line transformer N33 to the 3rd pin of power divider W3, and ground the 4th terminal of transmission line transformer N33; connect the 1st and 2nd pins of power divider W3 in parallel to ground, connect the 4th pin of power divider W3 in parallel with one end of resistor R173 and then connect it to one end of resistor R166, ground the 5th pin of power divider W3, connect the 6th pin of power divider W3 to the 4th pin of power divider W2, connect the 1st and 2nd pins of power divider W2 in parallel to ground, connect the 3rd pin of power divider W2 in parallel with one end of resistor R148 and then connect it to one end of resistor R144, ground the 5th pin of power divider W2, connect the other end of resistor R148 in parallel with one end of resistor R149 and then ground, and connect the other end of resistor R149 in parallel with the other end of resistor R144 and then connect it to the power divider W2. One end of capacitor C170 is connected to one end of amplifier N34. The other end of amplifier N34 is connected in parallel with one end of capacitor C171 and then connected to one end of inductor L26. The other end of inductor L26 is connected in parallel with the positive terminal of capacitors C164 and C163, the positive terminal of polarized capacitor C162, one end of resistor R135, and one end of resistor R138, and then connected to one end of resistor R141. The other end of resistor R141 is connected in parallel with the other ends of resistors R138 and R135 and then connected to 8V. The other end of capacitor C171 is connected in parallel with one end of resistor R150 and then connected to one end of resistor R145. The other end of resistor R145 is connected in parallel with one end of resistor R151 and then connected to pin 3 of power divider W4. The other end of resistor R150 is connected in parallel with the other end of resistor R151 and then grounded. Pin 1 of power divider W4 is connected in parallel with one end of resistor R16 and then connected to one end of capacitor C128. The other end of capacitor C128 is connected to pin 5 of detector D1. Pin 6 of detector D1 is connected in parallel with the positive terminal of polarized capacitor C120 and then connected to 5V. The negative terminal of polarized capacitor C120 is grounded. Pin 4 of detector D1 is connected in parallel with the other end of resistor R16 and then grounded. Pin 2 of power divider W4 is connected in parallel with one end of resistor R155 and then connected to one end of resistor R161. The other end of resistor R161 is connected in parallel with the other end of resistor R164 and then connected to one end of filter Z12. The other end of resistor R155 is connected in parallel with one end of resistor R164 and then grounded.The other end of resistor R166 is connected in parallel with one end of resistor R174 and then connected to one end of capacitor C188. The other end of resistor R174 is connected in parallel with the other end of resistor R173 and then grounded. The other end of capacitor C188 is connected to one end of amplifier N39. The other end of amplifier N39 is connected in parallel with one end of capacitor C189 and then connected to one end of inductor L30. The other end of inductor L30 is connected in parallel with one end of capacitor C183, one end of capacitor C182, the positive terminal of polarized capacitor C181, one end of resistor R153, and one end of resistor R154 and then connected to one end of resistor R157. The other end of resistor R157 is connected in parallel with the other ends of resistor R154 and resistor R153 and then connected to 8V. The other end of capacitor C189 is connected in parallel with one end of resistor R165 and then connected to resistor R162. The other end of resistor R165 is connected in parallel with one end of resistor R163 and then connected to the power divider. Pin 3 of W5 is connected to one end of resistor R163 and one end of resistor R162, and then grounded. Pin 2 of power divider W5 is connected to one end of resistor R181, and then connected to one end of resistor R184. The other end of resistor R184 is connected to one end of resistor R187, and then connected to one end of filter Z13. The other end of resistor R187 is connected to the other end of resistor R181, and then grounded. Pin 1 of power divider W5 is connected to one end of resistor R182, and then connected to one end of capacitor C203. The other end of resistor R182 is grounded. The other end of capacitor C203 is connected to pin 5 of detector D6. Pins 2 and 4 of detector D6 are grounded. Pin 3 of detector D6 is connected to one end of capacitor C214, and the other end of capacitor C214 is connected to 5V. Pin 6 of detector D6 is connected to one end of polarized capacitor C202, and then connected to 5V. The other end of polarized capacitor C202 is grounded. Pin 24 of clock generator N29 is connected to one end of resistor R146, and the other end of resistor R146 is connected to 3.3V. Pin 27 of clock generator N29 is connected in parallel with one end of capacitor C166 and then connected to 3.3V. The other end of capacitor C166 is grounded. Pin 28 of clock generator N29 is connected in parallel with one end of resistor R156 and then connected to one end of capacitor C198. Pin 29 of clock generator N29 is connected in parallel with one end of resistor R160 and then connected to one end of capacitor C190. The other end of capacitor C198 is connected to pin 1 of transmission line transformer N41. The connection is as follows: the other end of capacitor C190 is connected to terminal 2 of transmission line transformer N41; terminal 3 of transmission line transformer N41 is grounded; terminal 4 of transmission line transformer N41 is connected to one end of capacitor C207; the other end of capacitor C207 is connected to one end of amplifier N46; the other end of amplifier N46 is connected to one end of inductor L34; the other end of inductor L34 is connected in parallel with one end of capacitor C208 and then connected to one end of inductor L3; the other end of inductor L35 is connected to one end of capacitor C212, one end of capacitor C211, and the positive terminal of polarized capacitor C120. One end of resistor R190 and one end of resistor R191 are connected in parallel to one end of resistor R192. The other ends of resistor R192, the other ends of resistor R191, and the other ends of resistor R190 are connected in parallel to 8V. The other end of capacitor C212, the other end of capacitor C211, and the negative terminal of polarized capacitor C120 are connected in parallel to ground. The other end of capacitor C208 is connected to pin 1 of coupler N45. Pin 2 of coupler N45 is grounded. Pin 3 of coupler N45 is connected in parallel to one end of resistor R197 and then connected to pin 5 of detector D7. Resistor R197... The other end is grounded. Pin 6 of coupler N45 is connected in parallel with one end of resistor R195 and then connected to one end of resistor R196. The other end of resistor R196 is connected in parallel with one end of resistor R194 and then connected to one end of filter Z14. The other end of resistor R194 is connected in parallel with the other end of resistor R195 and then grounded. Pin 2 of detector D7 is grounded. Pin 3 of detector D7 is connected to one end of capacitor C213, and the other end of capacitor C213 is connected to 5V. Pin 6 of detector D7 is connected in parallel with the positive terminal of capacitor C209 and then connected to 5V. The negative terminal of capacitor C209 is grounded.

2. The direct frequency synthesis inverter according to claim 1, characterized in that, Pin 35 of clock generator N29 is connected in parallel with one end of resistor R13 and then connected to one end of capacitor C167. Pin 36 of clock generator N29 is connected in parallel with one end of resistor R132 and then connected to one end of capacitor C168. The other end of capacitor C168 is connected to terminal 2 of transmission line transformer N36, and the other end of capacitor C168 is connected to terminal 1 of transmission line transformer N36. Terminal 3 of transmission line transformer N36 is grounded. Terminal 4 of transmission line transformer N36 is connected to one end of capacitor C185, and the other end of capacitor C185 is connected to one end of amplifier N37. The other end of amplifier N37... One end of capacitor C179 is connected in parallel with the other end of capacitor C179 and then connected to one end of inductor L37. The other end of inductor L37 is connected in parallel with one end of capacitor C178, one end of capacitor C177, the positive terminal of polarized capacitor C173, and one end of resistor R140 and then connected to one end of resistor R139. The other end of resistor R139 is connected in parallel with the other end of resistor R140 and then connected to 8V. The other end of capacitor C179 is connected in parallel with one end of resistor R158 and then connected to one end of resistor R152. The other end of resistor R152 is connected in parallel with one end of resistor R159 and then connected to one end of amplifier N38. The other end of resistor R158 is connected in parallel with the other end of resistor R159. One end of the amplifier N38 is connected to ground. The other end of the amplifier N38 is connected to one end of the inductor L29. The other end of the inductor L29 is connected to one end of the inductor L28 and then connected to one end of the capacitor C180. The other end of the capacitor C180 is connected to pin 1 of the coupler N35. The other end of the inductor L28 is connected to one end of the capacitor C176, one end of the capacitor C175, the positive terminal of the polarized capacitor C174, one end of the resistor R142, and one end of the resistor R143 and then connected to one end of the resistor R147. The other end of the resistor R147 is connected to 8V after being connected to the other end of the resistor R143 and the other end of the resistor R142. The capacitor C176... The other end, the other end of capacitor C175, and the negative terminal of polarized capacitor C174 are connected in parallel and then grounded; pin 2 of coupler N35 is grounded, pin 3 of coupler N35 is connected in parallel with one end of resistor R171 and then connected to one end of capacitor C186, the other end of resistor R171 is grounded, pin 5 of coupler N35 is grounded, pin 6 of coupler N35 is connected to one end of resistor R137 and one end of resistor R133, the other end of resistor R133 is connected in parallel with one end of resistor R136 and one end of capacitor C161 and then connected to one end of inductor L25, the other end of resistor R136 is connected in parallel with one end of resistor R137 and then grounded;The other end of inductor L25 is connected in parallel with one end of capacitor C160 and then connected to one end of inductor L24. The other end of inductor L24 is connected in parallel with one end of capacitor C159 and then connected to one end of inductor L23. The other end of inductor L23 is connected in parallel with one end of capacitor C158 and then connected to one end of inductor L22. The other end of inductor L22 is connected to one end of capacitor C157. The other end of capacitor C157 is connected in parallel with the other ends of capacitors C158, C159, C160, and C161 and then grounded. The other end of capacitor C186 is connected to pin 5 of detector D4. Pins 2 and 4 of detector D4 are grounded. Pin 3 of detector D4 is connected to one end of capacitor C169. The other end of capacitor C169 is connected to 5V. Pin 6 of detector D4 is connected in parallel with the positive terminal of capacitor C184 and then connected to 5V. The negative terminal of polarized capacitor C184 is grounded.

3. A direct frequency synthesis inverter according to claim 1, characterized in that, Pin 37 of clock generator N29 is connected in parallel with one end of capacitor C154 and then grounded; the other end of capacitor C154 is connected in parallel with pin 38 of clock generator N29 and then connected to 3.3V; pin 41 of clock generator N29 is connected in parallel with one end of capacitor C151 and then connected to 3.3V; the other end of capacitor C151 is grounded; pin 42 of clock generator N29 is connected to one end of resistor R127 and then connected to one end of capacitor C152; pin 43 of clock generator N29 is connected to one end of resistor R124 and then connected to capacitor C148. One end of resistor R127 is connected in parallel with the other end of resistor R124 and then grounded; the other end of capacitor C148 is connected to terminal 1 of transmission line transformer N31; the other end of capacitor C152 is connected to terminal 2 of transmission line transformer N31; terminal 3 of transmission line transformer N31 is grounded; terminal 4 of transmission line transformer N31 is connected in parallel with one end of resistor R130 and then connected to one end of resistor R125; the other end of resistor R125 is connected in parallel with one end of resistor R131 and then connected to one end of capacitor C149; the other end of resistor R131... One end of capacitor C149 is connected in parallel with the other end of resistor R130 and then grounded. The other end of capacitor C149 is connected to one end of amplifier N32. The other end of amplifier N32 is connected to one end of inductor L21. The other end of inductor L21 is connected in parallel with one end of capacitor C150 and then connected to one end of inductor L20. The other end of inductor L20 is connected in parallel with one end of capacitor C147, one end of capacitor C146, the positive terminal of polarized capacitor C145, one end of resistor R121, and one end of resistor R122 and then connected to one end of resistor R123. The other end of resistor R123 is connected to... The other ends of resistors R122 and R121 are connected in parallel to 8V. The other ends of capacitors C147, C146, and C145 are connected in parallel to ground. The other end of capacitor C150 is connected in parallel to one end of resistor R128 and then to one end of R126. The other ends of resistor R126 and R129 are connected in parallel to one end of filter Z11. The other end of filter Z11 is connected to pin 3 of power divider W1. The other ends of resistors R129 and R128 are connected in parallel to ground.

4. A direct frequency synthesis inverter according to claim 1, characterized in that, Pin 47 of clock generator N29 is connected in parallel with one end of resistor R120 and then connected to one end of capacitor C144. Pin 48 of clock generator N29 is connected in parallel with one end of resistor R117 and then connected to one end of capacitor C140. The other end of capacitor C140 is connected to terminal 1 of transmission line transformer N28. The other end of capacitor C144 is connected to terminal 2 of transmission line transformer N28. Terminal 3 of transmission line transformer N28 is grounded. Terminal 4 of transmission line transformer N28 is connected to one end of capacitor C141. Pins 49, 50, and 51 of clock generator N29 are connected in parallel with one end of capacitor C138 and one end of capacitor C139, and then connected to 3.3V. The other end of capacitor C138 and capacitor C139 are connected in parallel. The other ends are all grounded; pin 52 of clock generator N29 is connected in parallel with one end of resistor R15 and then connected to one end of capacitor C124; pin 53 of clock generator N29 is connected in parallel with one end of resistor R13 and then connected to one end of capacitor C119; the other end of capacitor C119 is connected to terminal 1 of transmission line transformer N25; the other end of capacitor C124 is connected to terminal 2 of transmission line transformer N25; terminal 3 of transmission line transformer N25 is grounded; terminal 4 of transmission line transformer N25 is connected to one end of capacitor C131; the other end of capacitor C131 is connected to one end of amplifier N27; the other end of amplifier N27 is connected to one end of inductor L17; the other end of inductor L17 is connected in parallel with one end of capacitor C132. After connection, connect one end of inductor L15. The other end of inductor L15 is connected in parallel with one end of capacitor C127, one end of capacitor C126, the positive terminal of polarized capacitor C125, one end of resistor R8, and one end of resistor R10, then connected to one end of resistor R12. The other end of resistor R12 is connected in parallel with the other ends of resistor R10 and resistor R8, then connected to 8V. The other end of capacitor C127 is connected in parallel with the other end of capacitor C126 and the negative terminal of polarized capacitor C125, then grounded. The other end of capacitor C132 is connected in parallel with the other end of resistor R21, then connected to one end of resistor R19. The other end of resistor R19 is connected in parallel with resistor R22, then connected to one end of filter Z8. The other end of resistor R22 is connected in parallel with the other end of resistor R21, then grounded. The other end of filter Z8 is connected to pin 6 of component ADEX-1. Pin 1 of component ADEX-1 is grounded. Pins 4 and 5 of component ADEX-1 are connected in parallel and then grounded. Pin 2 of component ADEX-1 is connected in parallel with one end of resistor R17 and then connected to one end of resistor R14. The other end of resistor R14 is connected in parallel with the other end of resistor R18 and then connected to pin 1 of power divider W1. The other end of resistor R17 is connected in parallel with the other end of resistor R18 and then grounded. Pin 2 of power divider W1 is connected to one end of filter Z10. The other end of filter Z10 is connected in parallel with one end of resistor R119 and then connected to one end of resistor R116. The other end of resistor R116 is connected in parallel with one end of resistor R118 and then connected to one end of capacitor C142.The other end of resistor R118 is connected in parallel with the other end of resistor R119 and then grounded. The other end of capacitor C142 is connected in parallel with one end of inductor L18 and then connected to one end of inductor L19. The other end of inductor L19 is connected to one end of amplifier N30. The other end of amplifier N30 is connected to the other end of capacitor C141. The other end of inductor L18 is connected in parallel with one end of capacitor C137, one end of capacitor C136, the positive terminal of polarized capacitor C135, one end of resistor R20, and one end of resistor R78 and then connected to one end of resistor R110. The other end of resistor R20 is connected in parallel with the other ends of resistors R78 and R110 and then connected to 8V. The other end of capacitor C137 is connected in parallel with the other end of capacitor C136 and the negative terminal of polarized capacitor C135 and then grounded. Pin 3 of component ADEX-1 is connected to one end of capacitor C129. The other end of capacitor C129 is connected to amplifier N26. One end is connected, the other end of amplifier N26 is connected to one end of inductor L16, the other end of inductor L16 is connected in parallel with one end of capacitor C130 and then connected to one end of inductor L14, the other end of inductor L14 is connected in parallel with one end of capacitor C123, one end of capacitor C122, the positive terminal of polarized capacitor C121, one end of resistor R7, one end of resistor R9 and then connected to one end of resistor R11, the other end of resistor R11 is connected in parallel with the other ends of resistor R9 and resistor 7 and then connected to 8V, the other end of capacitor C123 is connected in parallel with the other end of capacitor C122 and the negative terminal of polarized capacitor C121 and then connected to ground, the other end of capacitor C130 is connected in parallel with one end of resistor R155 and then connected to one end of resistor R111, the other end of resistor R111 is connected in parallel with one end of resistor R114 and then connected to one end of filter Z9, the other end of resistor R115 is connected in parallel with the other end of resistor R114 and then connected to ground.

5. A direct frequency synthesis inverter according to claim 1, characterized in that, The broadband passive device is a broadband LC filter.

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