A schottky diode based terahertz frequency conversion component

Abstract

The application relates to a Schottky diode-based terahertz frequency conversion component and belongs to the technical field of terahertz communication, wherein the frequency conversion component comprises a local oscillator frequency multiplication link, a terahertz subharmonic mixer and a waveguide filter which are electrically connected in sequence, and the terahertz subharmonic mixer is also electrically connected with an intermediate frequency filter. The Schottky diode is used to manufacture a Q-band tripler, the manufacturing cost is extremely low, the design difficulty of the local oscillator link is reduced, the local oscillator frequency demand is reduced by the harmonic mixer, the testability of the local oscillator link is improved, and the troubleshooting cost and time are reduced.

Description

Technical Field

[0001] This invention relates to the field of terahertz communication technology, and in particular to a terahertz frequency conversion component based on a Schottky diode. Background Technology

[0002] With the popularization of 5G and the development of 6G communication technologies, terahertz communication, with its abundant bandwidth resources and ultra-high-speed transmission rate, has demonstrated unique application value in fields such as security inspection, biomedical imaging, and short-range communication. Conventional frequency conversion components generally use MMIC devices to achieve frequency conversion functions. However, there are few MMIC manufacturers in the terahertz band, the selection range of components is limited, and the prices are expensive, which is not conducive to the mass production of terahertz band radio frequency components. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a terahertz frequency conversion component based on Schottky diodes, thus solving the deficiencies of the prior art.

[0004] The objective of this invention is achieved through the following technical solution: a terahertz frequency conversion component based on a Schottky diode, the frequency conversion component comprising a local oscillator frequency doubling link, a terahertz subharmonic mixer and a waveguide filter connected in sequence, the terahertz subharmonic mixer also being electrically connected to an intermediate frequency filter;

[0005] The local oscillator frequency multiplication link multiplies the externally input local oscillator fundamental signal to the Q band, providing the local oscillator signal for the terahertz subharmonic mixer. When the frequency converter is used as a downlink channel, the terahertz subharmonic mixer downconverts the received terahertz band radio frequency signal to an intermediate frequency signal. The intermediate frequency filter is used to filter out the spurious signals leaked from the local oscillator to the intermediate frequency end, as well as the intermodulation combination spurious signals generated by the terahertz band radio frequency signal and the local oscillator signal. The waveguide filter is used to filter out the image frequency spurious signals of the frequency converter.

[0006] When the frequency converter is used as an uplink channel, the terahertz subharmonic mixer upconverts the intermediate frequency signal to a radio frequency signal in the terahertz band. The intermediate frequency filter is used to filter out spurious signals outside the intermediate frequency band, and the waveguide filter is used to filter out spurious signals leaked from the local oscillator to the radio frequency end, as well as intermodulation combination spurious signals generated by the intermediate frequency signal and the local oscillator signal.

[0007] The local oscillator frequency doubling link includes a fundamental frequency filter, a fundamental frequency amplifier, a Q-band frequency tripler, a Q-band filter, and a Q-band amplifier connected in sequence.

[0008] The fundamental frequency filter is used to filter out out-of-band spurious signals of the local oscillator fundamental frequency signal input from the frequency converter component. The fundamental frequency amplifier is used to amplify the local oscillator fundamental frequency signal input to the frequency converter component to a set factor. The Q-band tripler is used to triple the signal output from the fundamental frequency amplifier to the Q-band signal. The Q-band filter filters out odd harmonic signals (excluding the third harmonic) and even harmonic signals generated by the Q-band tripler. The Q-band amplifier amplifies the tripled signal output from the Q-band filter to the signal amplitude required by the terahertz harmonic mixer.

[0009] The Q-band tripler includes a first low-pass filter, a first input matching section, a first output matching section, and a first band-pass filter connected in sequence. Two first Schottky diodes connected in reverse parallel to ground are electrically connected between the first input matching section and the first output matching section.

[0010] In a balanced structure with reverse parallel grounding, a first input matching section and a first output matching section are connected across the first Schottky diode. At the same time, a first low-pass filter is used to filter out the fundamental harmonic spurious signals at the input port of the Q-band tripler, and a first band-pass filter is used to filter out the fundamental signal and higher harmonic signals at the output port.

[0011] The terahertz subharmonic mixer includes a second low-pass filter, a second input matching section, a second output matching section, and a second band-pass filter connected in sequence. The second output matching section is also electrically connected to the intermediate frequency low-pass filter.

[0012] The second input matching section and the second output matching section are electrically connected through two anti-parallel second Schottky diodes. The second input matching section and the second output matching section are connected across the two ends of the anti-parallel balanced structure of the second Schottky diodes. At the same time, the harmonic spurious signals of the local oscillator input signal are filtered out by the second low-pass filter at the input port of the terahertz subharmonic mixer, the local oscillator leakage signal is filtered out by the second band-pass filter at the RF port of the terahertz subharmonic mixer, and the local oscillator leakage signal is filtered out by the intermediate frequency low-pass filter at the intermediate frequency port of the terahertz subharmonic mixer.

[0013] The frequency conversion component consists of an upper cavity and a lower cavity. The radio frequency port of the local oscillator frequency doubling link is electrically connected to the waveguide-microstrip transition structure, and the waveguide-microstrip transition structure is electrically connected to the H-plane waveguide vertical bend. The local oscillator frequency doubling link, the terahertz subharmonic mixer, the waveguide-microstrip transition structure, and the H-plane waveguide vertical bend are integrated in the lower cavity.

[0014] The lower cavity is provided with an assembly position for an RF printed circuit board. The RF printed circuit board is sintered in the assembly position with conductive adhesive or solder paste. The RF printed circuit board is provided with an assembly position for a fundamental frequency filter, a fundamental frequency amplifier, a Q-band tripler, a Q-band filter, a Q-band amplifier, and a terahertz subharmonic mixer.

[0015] A groove is provided on the bottom surface of the lower cavity, and a power supply printed circuit board is provided in the groove. The power supply terminals of the frequency converter are provided on the side of the lower cavity. The lower cavity is also provided with a through-wall glass insulator to realize the power supply interconnection between the power supply printed circuit board and the device located in the lower cavity. One end of the glass insulator is electrically connected to the power supply printed circuit board, and the other end is electrically connected to the chip capacitor located in the power supply port of the device in the lower cavity through gold wire bonding. The chip capacitor is then electrically connected to the device through gold wire bonding.

[0016] A dual-port spare module mounting position is also provided on the bottom surface of the lower cavity. The spare module mounting position has two waveguide ports. The waveguide ports on the bottom surface of the spare module correspond to the positions of the waveguide ports in the spare module mounting position. The spare module is equipped with an amplifier chip or serves as a through waveguide.

[0017] The waveguide-microstrip transition structure is positioned at the electromagnetic field peak of the dominant mode of the rectangular waveguide, thus enabling the signal to transition from the TEM mode to the TE mode. 10 Modulus conversion.

[0018] The waveguide filter has vertical bends in the E-plane at both its input and output ports, making the overall waveguide filter C-shaped.

[0019] The waveguide filter is disposed on the top surface of the upper cavity, and the top surface of the upper cavity has two waveguide ports, which correspond to the input port and output port of the waveguide filter, respectively.

[0020] This invention offers the following advantages: a terahertz frequency converter based on Schottky diodes, using Schottky diodes to fabricate a Q-band third frequency multiplier, resulting in extremely low manufacturing costs and reduced design complexity of the local oscillator (LO) link; a harmonic mixer lowers the LO frequency requirement, improves the testability of the LO link, and reduces troubleshooting costs and time; modular design of the waveguide filter increases the LO-RF isolation of the frequency converter, reducing the deterioration of spurious emission suppression by spatial radiation; and it also improves the compatibility of the frequency converter with different operating frequency bands, further reducing design costs. Attached Figure Description

[0021] Figure 1 This is a block diagram illustrating the principle of the frequency converter component of the present invention;

[0022] Figure 2 This is a circuit topology diagram of the Q-band tripler of the present invention;

[0023] Figure 3 This is a circuit topology diagram of the terahertz subharmonic mixer of the present invention;

[0024] Figure 4 This is a simulation model diagram of the waveguide-microstrip transition structure of the present invention;

[0025] Figure 5This is a simulation model diagram of the vertical turning of the H-plane waveguide of the present invention;

[0026] Figure 6 This is a simulation model diagram of the vertical turning of the E-plane waveguide of the present invention;

[0027] Figure 7 This is a simulation model diagram of the waveguide filter of the present invention;

[0028] Figure 8 This is a top view of the terahertz frequency converter component structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the terahertz frequency converter component structure of the present invention;

[0030] In the diagram: 1-Local oscillator frequency multiplier link, 101-Fundamental wave filter, 102-Fundamental wave amplifier, 103-Q-band tripler, 104-Q-band filter, 105-Q-band amplifier, 103-1-First low-pass filter, 103-2-First input matching section, 103-3-First Schottky diode, 103-4-First output matching section, 103-5-First band-pass filter, 2-Terahertz subharmonic mixer, 201-Second low-pass filter, 202-Second input matching section. 203-Second Schottky diode, 204-Second output matching junction, 205-Second bandpass filter, 206-IF ​​low-pass filter, 3-Waveguide filter, 4-IF filter, 5-Waveguide-microstrip transition structure, 6-E-plane waveguide vertical turn, 7-H-plane waveguide vertical turn, 801-Upper cavity, 802-Lower cavity, 803-Spare module, 804-RF printed circuit board, 805-Power printed circuit board, 806-Power supply terminal, 807-Glass insulator, 808-Spare module mounting position. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of this application provided below with reference to the accompanying drawings is not intended to limit the scope of protection of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The present invention will be further described below with reference to the accompanying drawings.

[0032] This invention specifically relates to a terahertz frequency converter based on Schottky diodes. Schottky diodes are used to fabricate a Q-band tripler and a terahertz-band subharmonic mixer circuit, thus bypassing the selection of a terahertz-band MMIC mixer. This reduces the manufacturing cost of the terahertz-band frequency converter.

[0033] like Figure 1 As shown, the frequency conversion component includes a local oscillator frequency multiplier link 1, a terahertz harmonic mixer 2, an intermediate frequency filter 4, and a waveguide filter 3. The local oscillator frequency multiplier link 1 is electrically connected to the local oscillator input port of the terahertz harmonic mixer 2, the RF port of the terahertz harmonic mixer 2 is electrically connected to the waveguide filter 3, and the intermediate frequency port of the terahertz harmonic mixer 2 is electrically connected to the intermediate frequency filter 4.

[0034] Local oscillator frequency multiplication link 1 multiplies the externally input local oscillator fundamental signal to the Q band, providing the local oscillator signal for terahertz subharmonic mixer 2; when the frequency converter is used as a downlink channel, terahertz subharmonic mixer 2 downconverts the received terahertz band RF signal to an intermediate frequency signal; when the frequency converter is used as an uplink channel, terahertz subharmonic mixer 2 upconverts the intermediate frequency signal to a terahertz band RF signal.

[0035] When the frequency converter is used as a downlink channel, the intermediate frequency filter 4 is used to filter out spurious signals leaking from the local oscillator to the intermediate frequency end, as well as intermodulation combination spurious signals generated by the terahertz band radio frequency signal and the local oscillator signal. When the frequency converter is used as an uplink channel, the intermediate frequency filter 4 is used to filter out spurious signals outside the intermediate frequency band.

[0036] When the frequency converter is used as a downlink channel, the waveguide filter 3 is used to filter out the image frequency spurious signal of the frequency converter. When the frequency converter is used as an uplink channel, the waveguide filter 3 is used to filter out the spurious signal leaked from the local oscillator to the radio frequency end, as well as the intermodulation combination spurious signal generated by the intermediate frequency signal and the local oscillator signal.

[0037] Furthermore, the local oscillator frequency multiplier link 1 includes a fundamental frequency filter 101, a fundamental frequency amplifier 102, a Q-band tripler 103, a Q-band filter 104, and a Q-band amplifier 105. The fundamental frequency filter 101 is electrically connected to the fundamental frequency amplifier 102, the fundamental frequency amplifier 102 is electrically connected to the Q-band tripler 103, the Q-band tripler 103 is electrically connected to the Q-band filter 104, and the Q-band filter 104 is electrically connected to the Q-band amplifier 105.

[0038] Among them, the fundamental frequency filter 101 is used to filter out out-of-band spurious signals of the local oscillator fundamental frequency signal input from the frequency converter component, the fundamental frequency amplifier 102 is used to amplify the local oscillator fundamental frequency signal input to the frequency converter component to a certain factor, the Q-band tripler 103 is used to triple the signal output by the fundamental frequency amplifier 102 to the Q-band signal, the Q-band filter 104 filters out odd harmonic signals and even harmonic signals other than the third harmonic generated by the Q-band tripler 103, and the Q-band amplifier 105 amplifies the tripled signal output by the Q-band filter 104 to the signal amplitude required by the terahertz subharmonic mixer 2.

[0039] Furthermore, such as Figure 2 As shown, the Q-band tripler 103 includes a first low-pass filter 103-1, a first input matching section 103-2, two first Schottky diodes 103-3, a first output matching section 103-4, and a first band-pass filter 103-5. The first low-pass filter 103-1 is electrically connected to the first input matching section 103-2. The first input matching section 103-2 is electrically connected to the two first Schottky diodes 103-3 connected to ground in reverse parallel. The two first Schottky diodes 103-3 connected in reverse parallel are electrically connected to the first output matching section 103-4. The first output matching section 103-4 is electrically connected to the first band-pass filter 103-5.

[0040] This invention employs two diodes connected in reverse parallel to ground to design a balanced Q-band tripler 103. This increases the circuit's power capacity, thereby improving the multiplier's output power. Simultaneously, the balanced structure suppresses harmonic signals. The output signal of this balanced structure contains only the odd harmonics of the input signal. Utilizing this principle, matching is performed at the input and output terminals of the first Schottky diode 103-3 in the balanced structure connected in reverse parallel to ground. A first low-pass filter 103-1 is added to the input port of the Q-band tripler 103 to filter out harmonic spurious signals of the fundamental frequency, and a first band-pass filter 103-5 is added to the output port of the Q-band tripler 103 to filter out the fundamental signal and higher harmonic signals.

[0041] Furthermore, such as Figure 3As shown, the terahertz subharmonic mixer 2 includes a second low-pass filter 201, a second input matching section 202, two second Schottky diodes 203, a second output matching section 204, a second bandpass filter 205, and an intermediate frequency (IF) low-pass filter 206. The second low-pass filter 201 is electrically connected to the second input matching section 202. The second input matching section 202 is electrically connected to the two second Schottky diodes 203 connected in anti-parallel. The two second Schottky diodes 203 connected in anti-parallel are electrically connected to the second output matching section 204. The RF port of the second output matching section 204 is electrically connected to the second bandpass filter 205, and the IF port of the second output matching section 204 is electrically connected to the IF low-pass filter 206.

[0042] This invention employs two diodes connected in anti-parallel to design a balanced terahertz subharmonic mixer 2. By utilizing the phase relationship between the diodes, odd or even harmonic components are canceled out, thereby reducing local oscillator phase noise and minimizing conversion losses. Compared to the fundamental frequency mixer, the terahertz subharmonic mixer 2 is more efficient in utilizing harmonic components. The terahertz subharmonic mixer 2 uses even or odd harmonics of the local oscillator signal to mix with the received RF signal; therefore, the required local oscillator operating frequency is only half the frequency of the fundamental frequency mixer's local oscillator signal. The terahertz subharmonic mixer 2 has lower requirements for the local oscillator source, effectively reducing circuit costs and simplifying filter design and fabrication.

[0043] Using this principle, the input and output of the second Schottky diode 203 in a balanced structure connected in reverse parallel are matched. At the same time, a second low-pass filter 201 is added to the input port of the terahertz subharmonic mixer 2 to filter out harmonic spurious signals of the local oscillator input signal, a second band-pass filter 205 is added to the RF port of the terahertz subharmonic mixer 2 to filter out local oscillator leakage signals, and an intermediate frequency low-pass filter 206 is added to the IF port of the terahertz subharmonic mixer 2 to filter out local oscillator leakage signals.

[0044] like Figure 4 and Figure 5 As shown, the local oscillator frequency multiplier link 1 is electrically connected to the local oscillator port of the terahertz subharmonic mixer 2. The RF port of the terahertz subharmonic mixer 2 is electrically connected to the waveguide-microstrip transition structure 5. The waveguide-microstrip transition structure 5 is electrically connected to the H-plane waveguide vertical bend 7. The waveguide-microstrip transition structure 5 is located at the electromagnetic field peak of the main mode of the rectangular waveguide. It is used to realize the signal transition from the TEM mode to the TE mode. 10 Modulus conversion. For example... Figure 6 and Figure 7 As shown, both the input and output ports of the waveguide filter 3 are equipped with E-plane waveguide vertical bends 6, making the waveguide filter 3 as a whole C-shape, so that the input and output waveguide ports of the waveguide filter 3 are connected to the two waveguide ports on the top surface of the upper cavity 801.

[0045] like Figure 8 and Figure 9 As shown, the frequency conversion component is divided into an upper cavity 801 and a lower cavity 802 at the midpoint of the wide side of the waveguide. The local oscillator frequency doubling link 1, the terahertz subharmonic mixer 2, the waveguide-microstrip transition structure 5, and the H-plane waveguide vertical turn 7 are integrated in the lower cavity of the component.

[0046] Furthermore, the lower cavity 802 is provided with an assembly position for an RF printed circuit board 804. The RF printed circuit board 804 is sintered in the assembly position with conductive adhesive or solder paste. The RF printed circuit board 804 is provided with assembly positions for a fundamental frequency filter 101, a fundamental frequency amplifier 102, a Q-band tripler 103, a Q-band filter 104, a Q-band amplifier 105, and a terahertz subharmonic mixer 2. Each functional device is electrically connected to the RF printed circuit board 804 by gold wire bonding.

[0047] A power supply printed circuit board 805 is disposed in a recessed area on the bottom surface of the lower cavity 802 of the component. In the power supply design of the frequency converter component, a power supply terminal 806 is provided on the side of the lower cavity 802 for an external power supply to provide power to the frequency converter component. A through-wall glass insulator 807 is disposed near the power supply port of each active device on the microwave surface of the lower cavity 802 to achieve power supply interconnection between the power supply printed circuit board 805 and the active devices. One end of the glass insulator 807 is electrically connected to the power supply printed circuit board 805, and the other end is electrically connected via gold wire bonding to a chip capacitor placed near the power supply port of the active device. The chip capacitor is then electrically connected to the active device via gold wire bonding. The chip capacitor is used to improve power supply ripple and decoupling.

[0048] The bottom surface of the lower cavity 802 is provided with a dual-port spare module mounting position 808. The spare module mounting position 808 is provided with two waveguide ports. The waveguide port on the bottom surface of the spare module 803 corresponds to the waveguide port in the spare module mounting position 808. The spare module 803 can be equipped with an amplifier chip or used as a through waveguide to adapt to different needs, thus broadening the application scenarios of the frequency converter component.

[0049] Furthermore, the top surface of the upper cavity 801 is provided with two waveguide ports, which correspond to the input and output ports of the waveguide filter 3, respectively. The waveguide filter 3 has excellent rectangular coefficients, which can further suppress local oscillator leakage signals, local oscillator fundamental signals, and local oscillator higher harmonic signals when the frequency converter is used for upconversion, thus improving signal quality. When used for downconversion, it can also suppress image frequency signals, ensuring normal RF signal transmission and reception. The independently detachable waveguide filter 3 can also be flexibly replaced according to engineering needs, improving the compatibility of the frequency converter with different operating frequency bands.

[0050] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and improvements, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A terahertz frequency converter based on a Schottky diode, characterized in that: The frequency conversion component includes a local oscillator frequency multiplier link, a terahertz subharmonic mixer and a waveguide filter connected in sequence, and the terahertz subharmonic mixer is also electrically connected to an intermediate frequency filter. The local oscillator frequency multiplication link multiplies the externally input local oscillator fundamental signal to the Q band, providing the local oscillator signal for the terahertz subharmonic mixer. When the frequency converter is used as a downlink channel, the terahertz subharmonic mixer downconverts the received terahertz band radio frequency signal to an intermediate frequency signal. The intermediate frequency filter is used to filter out the spurious signals leaked from the local oscillator to the intermediate frequency end, as well as the intermodulation combination spurious signals generated by the terahertz band radio frequency signal and the local oscillator signal. The waveguide filter is used to filter out the image frequency spurious signals of the frequency converter. When the frequency converter is used as an uplink channel, the terahertz subharmonic mixer upconverts the intermediate frequency signal to a radio frequency signal in the terahertz band. The intermediate frequency filter is used to filter out spurious signals outside the intermediate frequency band, and the waveguide filter is used to filter out spurious signals leaked from the local oscillator to the radio frequency end, as well as intermodulation combination spurious signals generated by the intermediate frequency signal and the local oscillator signal. The local oscillator frequency doubling link includes a fundamental frequency filter, a fundamental frequency amplifier, a Q-band frequency tripler, a Q-band filter, and a Q-band amplifier connected in sequence. The fundamental frequency filter is used to filter out out-of-band spurious signals of the local oscillator fundamental frequency signal input from the frequency converter component. The fundamental frequency amplifier is used to amplify the local oscillator fundamental frequency signal input to the frequency converter component to a set factor. The Q-band tripler is used to triple the signal output from the fundamental frequency amplifier to the Q-band signal. The Q-band filter filters out odd harmonic signals (excluding the third harmonic) and even harmonic signals generated by the Q-band tripler. The Q-band amplifier amplifies the tripled signal output from the Q-band filter to the signal amplitude required by the terahertz harmonic mixer. The Q-band tripler includes a first low-pass filter, a first input matching section, a first output matching section, and a first band-pass filter connected in sequence. Two first Schottky diodes connected in reverse parallel to ground are electrically connected between the first input matching section and the first output matching section. In a balanced structure with reverse parallel grounding, a first input matching section and a first output matching section are connected across the first Schottky diode. At the same time, a first low-pass filter is used to filter out the fundamental harmonic spurious signal at the input port of the Q-band tripler, and a first band-pass filter is used to filter out the fundamental signal and higher harmonic signals at the output port. The frequency conversion component consists of an upper cavity and a lower cavity. The radio frequency port of the local oscillator frequency doubling link is electrically connected to the waveguide-microstrip transition structure, and the waveguide-microstrip transition structure is electrically connected to the H-plane waveguide vertical bend. The local oscillator frequency doubling link, the terahertz subharmonic mixer, the waveguide-microstrip transition structure, and the H-plane waveguide vertical bend are integrated in the lower cavity. The lower cavity is provided with an assembly position for an RF printed circuit board. The RF printed circuit board is sintered in the assembly position with conductive adhesive or solder paste. The RF printed circuit board is provided with an assembly position for a fundamental frequency filter, a fundamental frequency amplifier, a Q-band tripler, a Q-band filter, a Q-band amplifier, and a terahertz subharmonic mixer.

2. The terahertz frequency conversion component based on a Schottky diode according to claim 1, characterized in that: The terahertz subharmonic mixer includes a second low-pass filter, a second input matching section, a second output matching section, and a second band-pass filter connected in sequence. The second output matching section is also electrically connected to the intermediate frequency low-pass filter. The second input matching section and the second output matching section are electrically connected through two anti-parallel second Schottky diodes. The second input matching section and the second output matching section are connected across the two ends of the anti-parallel balanced structure of the second Schottky diodes. At the same time, the harmonic spurious signals of the local oscillator input signal are filtered out by the second low-pass filter at the input port of the terahertz subharmonic mixer, the local oscillator leakage signal is filtered out by the second band-pass filter at the RF port of the terahertz subharmonic mixer, and the local oscillator leakage signal is filtered out by the intermediate frequency low-pass filter at the intermediate frequency port of the terahertz subharmonic mixer.

3. A terahertz frequency conversion component based on a Schottky diode according to claim 1, characterized in that: A groove is provided on the bottom surface of the lower cavity, and a power supply printed circuit board is provided in the groove. The power supply terminals of the frequency converter are provided on the side of the lower cavity. The lower cavity is also provided with a through-wall glass insulator to realize the power supply interconnection between the power supply printed circuit board and the device located in the lower cavity. One end of the glass insulator is electrically connected to the power supply printed circuit board, and the other end is electrically connected to the chip capacitor located in the power supply port of the device in the lower cavity through gold wire bonding. The chip capacitor is then electrically connected to the device through gold wire bonding.

4. A terahertz frequency converter based on a Schottky diode according to claim 1, characterized in that: A dual-port spare module mounting position is also provided on the bottom surface of the lower cavity. The spare module mounting position has two waveguide ports. The waveguide ports on the bottom surface of the spare module correspond to the positions of the waveguide ports in the spare module mounting position. The spare module is equipped with an amplifier chip or serves as a through waveguide.

5. A terahertz frequency converter based on a Schottky diode according to claim 1, characterized in that: The waveguide-microstrip transition structure is positioned at the electromagnetic field peak of the dominant mode of the rectangular waveguide, thus enabling the signal to transition from the TEM mode to the TE mode. 10 Modulus conversion.

6. A terahertz frequency conversion component based on a Schottky diode according to claim 1, characterized in that: The waveguide filter has vertical bends in the E-plane at both its input and output ports, making the overall waveguide filter C-shaped.

7. A terahertz frequency conversion component based on a Schottky diode according to claim 1, characterized in that: The waveguide filter is disposed on the top surface of the upper cavity, and the top surface of the upper cavity has two waveguide ports, which correspond to the input port and output port of the waveguide filter, respectively.

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