Six-band phased array receiving circuit

Abstract

The utility model discloses a six-waveband phased array receiving circuit, which comprises an antenna switch access interface, an antenna selection switch connected with the antenna switch access interface, a first one-to-six selection switch connected with the antenna switch access interface through a capacitor C1, and a second one-to-six selection switch connected with the antenna switch access interface through a capacitor C2. The first three-section LC filter, the second three-section LC filter and the second one-to-six selective switch are connected with the first one-to-six selective switch, the low-noise amplifier is connected with the second one-to-six selective switch through a capacitor C2, the power supply filter circuit is connected with the low-noise amplifier, and the antenna switch output interface is connected with the low-noise amplifier through a capacitor C3. And the power supply circuit supplies power to the whole circuit. According to the utility model, the signals are effectively separated through the six filters, and the six paths of signals are effectively combined into one path to be output through the selection switch, so that the output signals are relatively clean and are not interfered by out-of-band clutter signals, and the output signals are easier to analyze.

Description

Technical Field

[0001] The utility model belongs to the technical field of microwave communications, and in particular relates to a six-band phased array receiving circuit. Background Art

[0002] The phased array receiving circuit is the phased array TR component, which is called Transmitter and Receiver. One end is connected to the antenna and the other end is connected to the intermediate frequency processing unit to form a wireless transceiver system. Its function is to amplify, phase shift and attenuate the signal.

[0003] With the localization of the chip layer of phased array radar, phased array radar is widely used in military, agricultural and meteorological fields. However, the synthetic voltage wave that traditional phased array radar relies on has a weak ability to remove clutter, which leads to the presence of clutter signals in the scanning electromagnetic waves emitted by the TR component of the phased array radar. On the one hand, it reduces the effective transmission power of the phased array radar, and on the other hand, it increases the difficulty of parsing after the TR component of the phased array radar receives the echo.

[0004] The existing phased array TR components process the received signals through a filter, which makes it difficult to filter out the external clutter signals, causing the signals to be easily interfered by the out-of-band clutter signals, making the output signals difficult to analyze. Utility Model Content

[0005] The utility model aims to provide a six-band phased array receiving circuit, which mainly solves the problem that the existing phased array signal receiving is easily interfered by out-of-band clutter signals, making the output signal difficult to analyze.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A six-band phased array receiving circuit comprises an antenna switch access interface, an antenna selection switch connected to the antenna switch access interface, a first one-to-six selection switch connected to the antenna switch access interface via a capacitor C1, a first three-stage LC filter, a second three-stage LC filter and a second one-to-six selection switch connected to the first one-to-six selection switch, a low-noise amplifier connected to the second one-to-six selection switch via a capacitor C2, a power supply filter circuit connected to the low-noise amplifier, an antenna switch output interface connected to the low-noise amplifier via a capacitor C3, and a power supply circuit for supplying power to the entire circuit.

[0008] Furthermore, in the utility model, the models of the first-select-six selection switch and the second-select-six selection switch are both PE42462, and the V1, V2, and V3 pins of the first-select-six selection switch are correspondingly connected to the V1, V2, and V3 pins of the second-select-six selection switch; the first three-stage LC filter is connected between the RF1, RF2, and RF3 pins of the first-select-six selection switch and the RF1, RF2, and RF3 pins of the second-select-six selection switch; the second three-stage LC filter is connected between the RF4, RF5, and RF6 pins of the first-select-six selection switch and the RF4, RF5, and RF6 pins of the second-select-six selection switch; the capacitor C1 is connected to the RFC pin of the first-select-six selection switch; and the capacitor C2 is connected to the RFC pin of the second-select-six selection switch.

[0009] Furthermore, in the utility model, the frequency bands of the three filters in the first three-stage LC filter are 200MHz~450MHz, 450MHz~760MHz, and 760MHz~1100MHz respectively; the frequency bands of the three filters in the second three-stage LC filter are 1100MHz~1410MHz, 1410MHz~2050MHz, and 2050MHz~3000MHz respectively.

[0010] Furthermore, in the utility model, the power supply filter circuit includes an inductor L1 having one end connected to the third pin of the low noise amplifier, and capacitors C4 and C5 having one end connected to the other end of the inductor L1 and the other end grounded; wherein the common end of the capacitor C4 and the inductor L1 is connected to the power supply circuit.

[0011] Furthermore, in the utility model, the power supply circuit includes an 8V to 3.3V voltage stabilizing circuit, an 8V to 5V voltage stabilizing circuit, an 8V to 6V voltage stabilizing circuit, a power supply negative voltage generator, a power supply filter, an output interface circuit and a resistor network; the 8V to 3.3V voltage stabilizing circuit is used to power two one-to-six selection switches, the 8V to 5V voltage stabilizing circuit is used to power a low-noise amplifier and provide a reference voltage to the power supply negative voltage generator; the 8V to 6V voltage stabilizing circuit is used to power the antenna selection switch; the power supply negative voltage generator is used to generate negative voltage to power the antenna selection switch; the power supply filter is used for power supply input filtering; the output interface circuit is used as a power supply connector; the resistor network is connected to the output interface circuit for pulling up the power supply voltage.

[0012] Furthermore, in the utility model, the antenna selection switch includes resistors R2 and R3 at one end for connecting to the peripheral dial control unit, a single-pole double-throw switch S1 whose fixed end is connected to the other end of the resistor R2, and a single-pole double-throw switch S2 whose fixed end is connected to the other end of the resistor R3; wherein the other ends of the resistors R2 and R3 are connected by wires, and the two free ends of the single-pole double-throw switch S1 and the two free ends of the single-pole double-throw switch S2 are respectively connected to a -5V voltage and a +6V voltage.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) The receiving circuit of the utility model receives the weak signal input through the antenna, and sends the signal to the filter of each frequency band through the six-choice selection switch. The switch selection is realized through the peripheral control circuit. The six-band filters are 200M-450M, 450M-760M, 760M-1100M, 1100M-1410M, 1410M-2050M, and 2020M-3000M. The signal is effectively separated by the six-band filter, and the six-way signal is effectively synthesized into one output through the selection switch. The signal is relatively clean and not interfered by the out-of-band clutter signal, so that the output signal is easier to analyze. The frequency selection network will attenuate the signal to a certain extent, which makes the useful signal relatively weak and easy to be lost during the transmission process. Therefore, the low-noise amplifier TQP3M9028 should be selected for effective amplification, so that the useful signal will not be lost and transmitted and output.

[0015] (2) The power supply of the utility model is a standard 12V input, which is convenient for long-distance transmission. The power input is effectively stabilized by two power regulators, and the output voltages are 5V and 3.3V respectively, which can better power the selection switch and high-frequency low-noise amplifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the power supply circuit in the utility model;

[0018] Figure 3 This is a circuit diagram of the antenna selection switch in the utility model;

[0019] Figure 4 It is a circuit diagram of the resistor network in the utility model. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.

[0021] Example

[0022] like Figure 1 As shown, the utility model discloses a six-band phased array receiving circuit, including an antenna switch access interface, an antenna selection switch connected to the antenna switch access interface, a first one-to-six selection switch connected to the antenna switch access interface via a capacitor C1, a first three-stage LC filter, a second three-stage LC filter and a second one-to-six selection switch connected to the first one-to-six selection switch, a low-noise amplifier connected to the second one-to-six selection switch via a capacitor C2, a power filter circuit connected to the low-noise amplifier, an antenna switch output interface connected to the low-noise amplifier via a capacitor C3, and a power supply circuit for powering the entire circuit. Among them, the first one-to-six selection switch and the second one-to-six selection switch are mainly used to allow the input signal to enter a separate radio frequency filter filter output, so that the output signal is clean within the effective range and does not interfere with each other. The low-noise amplifier is mainly used to effectively amplify the output signal of the switch filter. Weak signals are detected and useful signals are found in white noise signals. The power filter circuit is mainly used to provide a power supply voltage of 5V to the low-noise amplifier, the capacitor is mainly used for filtering, the inductor is mainly used for reducing ripples, and the overall startup has a suppressive effect on the power supply ripple. The antenna selection switch is input through the peripheral dial control unit, which mainly controls the input of the switch, and the through switch is the filter adjustment. It mainly completes the selection of the high and low gain of the antenna and completes the two-way selection.

[0023] In this embodiment, the first selector switch and the second selector switch are both of model PE42462, and the V1, V2, and V3 pins of the first selector switch are correspondingly connected to the V1, V2, and V3 pins of the second selector switch; the first three-stage LC filter is connected between the RF1, RF2, and RF3 pins of the first selector switch and the RF1, RF2, and RF3 pins of the second selector switch; the second three-stage LC filter is connected between the RF4, RF5, and RF6 pins of the first selector switch and the RF4, RF5, and RF6 pins of the second selector switch; the capacitor C1 is connected to the RFC pin of the first selector switch; and the capacitor C2 is connected to the RFC pin of the second selector switch.

[0024] Among them, the frequency bands of the three filters in the first three-stage LC filter are 200MHz~450MHz, 450MHz~760MHz, and 760MHz~1100MHz respectively; the frequency bands of the three filters in the second three-stage LC filter are 1100MHz~1410MHz, 1410MHz~2050MHz, and 2050MHz~3000MHz respectively.

[0025] In this embodiment, the power filter circuit includes an inductor L1 connected to the third pin of the low noise amplifier at one end, and capacitors C4 and C5 connected to the other end of the inductor L1 at one end and grounded at the other end; wherein the common end of the capacitor C4 and the inductor L1 is connected to the power supply circuit. The circuit is mainly used for power supply of the antenna switch, and the output is used for the switch. The normal operation of the switch must first provide negative pressure. Only when the negative pressure is normal can it work normally.

[0026] like Figure 2 As shown, in this embodiment, the power supply circuit includes an 8V to 3.3V voltage stabilizing circuit, an 8V to 5V voltage stabilizing circuit, an 8V to 6V voltage stabilizing circuit, a power supply negative voltage generator, a power supply filter, an output interface circuit and a resistor network; the 8V to 3.3V voltage stabilizing circuit is used to power two one-to-six selection switches, the 8V to 5V voltage stabilizing circuit is used to power a low-noise amplifier and provide a reference voltage to the power supply negative voltage generator; the 8V to 6V voltage stabilizing circuit is used to power the antenna selection switch; the power supply negative voltage generator is used to generate negative voltage to power the antenna selection switch; the power supply filter is used for power supply input filtering; the output interface circuit is used as a power supply connector; the resistor network is connected to the output interface circuit and is used for pulling up the power supply voltage. Figure 4 It is a commonly used resistor network circuit. The power supply circuit is constructed using existing technology, and the power management chips of the voltage stabilization circuit include REG101NA-3.3, REG102NA-5 and REG101NA-A.

[0027] like Figure 3 As shown, in this embodiment, the antenna selection switch includes resistors R2 and R3 at one end for connecting to the peripheral dial control unit, a single-pole double-throw switch S1 whose fixed end is connected to the other end of the resistor R2, and a single-pole double-throw switch S2 whose fixed end is connected to the other end of the resistor R3; wherein the other ends of the resistors R2 and R3 are connected by wires, and the two free ends of the single-pole double-throw switch S1 and the two free ends of the single-pole double-throw switch S2 are respectively connected to a -5V voltage and a +6V voltage.

[0028] Through the above design, the signal of the utility model is effectively separated by a six-band filter, and the six-way signal is effectively synthesized into one output through the selection switch, so that the output signal is relatively clean and not interfered by out-of-band clutter signals, making the output signal easier to analyze. The frequency selection network will attenuate the signal to a certain extent, which makes the useful signal relatively weak and easy to be lost during the transmission process. Therefore, the low-noise amplifier TQP3M9028 should be used for effective amplification, so that the useful signal will not be lost and transmitted and output.

[0029] The above embodiment is only one of the preferred implementation modes of the present utility model and should not be used to limit the protection scope of the present utility model. Any changes or modifications that are made to the main design concept and spirit of the present utility model without any substantive significance, as long as the technical problems solved are still consistent with the present utility model, should be included in the protection scope of the present utility model.

Claims

1. A six-band phased array receiving circuit, characterized in that: It includes an antenna switch access interface, an antenna selection switch connected to the antenna switch access interface, a first one-to-six selection switch connected to the antenna switch access interface via a capacitor C1, a first three-stage LC filter, a second three-stage LC filter and a second one-to-six selection switch connected to the first one-to-six selection switch, a low-noise amplifier connected to the second one-to-six selection switch via a capacitor C2, a power supply filter circuit connected to the low-noise amplifier, an antenna switch output interface connected to the low-noise amplifier via a capacitor C3, and a power supply circuit for supplying power to the entire circuit.

2. The six-band phased array receiving circuit according to claim 1, characterized in that: The first-select-six selector switch and the second-select-six selector switch are both PE42462, and the V1, V2, and V3 pins of the first-select-six selector switch are correspondingly connected to the V1, V2, and V3 pins of the second-select-six selector switch; the first three-stage LC filter is connected between the RF1, RF2, and RF3 pins of the first-select-six selector switch and the RF1, RF2, and RF3 pins of the second-select-six selector switch; the second three-stage LC filter is connected between the RF4, RF5, and RF6 pins of the first-select-six selector switch and the RF4, RF5, and RF6 pins of the second-select-six selector switch; the capacitor C1 is connected to the RFC pin of the first-select-six selector switch; and the capacitor C2 is connected to the RFC pin of the second-select-six selector switch.

3. The six-band phased array receiving circuit according to claim 2, characterized in that: The frequency bands of the three filters in the first three-stage LC filter are 200MHz to 450MHz, 450MHz to 760MHz, and 760MHz to 1100MHz respectively; the frequency bands of the three filters in the second three-stage LC filter are 1100MHz to 1410MHz, 1410MHz to 2050MHz, and 2050MHz to 3000MHz respectively.

4. The six-band phased array receiving circuit according to claim 3, characterized in that: The power filter circuit includes an inductor L1 with one end connected to the third pin of the low noise amplifier, and capacitors C4 and C5 with one end connected to the other end of the inductor L1 and the other end grounded; wherein the common end of the capacitor C4 and the inductor L1 is connected to the power supply circuit.

5. The six-band phased array receiving circuit according to claim 4, characterized in that: The power supply circuit includes an 8V to 3.3V voltage stabilizing circuit, an 8V to 5V voltage stabilizing circuit, an 8V to 6V voltage stabilizing circuit, a power supply negative voltage generator, a power supply filter, an output interface circuit and a resistor network; the 8V to 3.3V voltage stabilizing circuit is used to power two one-to-six selection switches, the 8V to 5V voltage stabilizing circuit is used to power a low-noise amplifier and provide a reference voltage to the power supply negative voltage generator; the 8V to 6V voltage stabilizing circuit is used to power the antenna selection switch; the power supply negative voltage generator is used to generate negative voltage to supply power to the antenna selection switch; the power supply filter is used for power supply input filtering; the output interface circuit is used as a power supply connector; The resistor network is connected to the output interface circuit and is used for pulling up the power supply voltage.

6. The six-band phased array receiving circuit according to claim 5, characterized in that: The antenna selection switch includes resistors R2 and R3 at one end for connecting to the peripheral dial control unit, a single-pole double-throw switch S1 whose fixed end is connected to the other end of the resistor R2, and a single-pole double-throw switch S2 whose fixed end is connected to the other end of the resistor R3; wherein the other ends of the resistors R2 and R3 are connected by wires, and the two free ends of the single-pole double-throw switch S1 and the two free ends of the single-pole double-throw switch S2 are respectively connected to a -5V voltage and a +6V voltage.

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