CN203039680U

CN203039680U - W-band high-performance radio frequency receiving/transmitting assembly

Info

Publication number: CN203039680U
Application number: CN201220656826XU
Authority: CN
Inventors: 王海涛; 陈大海; 石磊
Original assignee: Shanghai Radio Equipment Research Institute
Current assignee: Shanghai Shentian Industrial Co ltd
Priority date: 2012-12-04
Filing date: 2012-12-04
Publication date: 2013-07-03
Anticipated expiration: 2022-12-04

Abstract

The utility model provides a W-band high-performance radio frequency receiving/transmitting assembly. The W-band high-performance radio frequency receiving/transmitting assembly includes a radio frequency receiving assembly and a radio frequency transmitting assembly, wherein the radio frequency transmitting assembly comprises a temperature compensation-type quartz crystal resonator, a phase-locked loop which is in circuit connection with an output end of the temperature compensation-type quartz crystal resonator, a first multiplier which is in circuit connection with an output end of the phase-locked loop, a second multiplier which is in circuit connection with an output end of the first multiplier, an active-biasing controller which is in circuit connection with an output end of the second multiplier, and a transmitting antenna which is in circuit connection with an output end of the active-biasing controller and is used for transmitting W-band wireless signals. The W-band high-performance radio frequency receiving/transmitting assembly of the utility model has the advantages of simple circuit, lower requirement for the performance of a voltage controlled oscillator VCO, convenient debugging as well as low cost and strong versatility and in engineering; the W-band high-performance radio frequency receiving/transmitting assembly of the utility model can flexibly generate different kinds of signal waveform; and the W-band high-performance radio frequency receiving/transmitting assembly is a frequency modulation continuous wave signal generating device which has great potential and superiority.

Description

W-band high-performance radio frequency receiving and transmitting assembly

Technical Field

The utility model relates to a subassembly for radar detection system, concretely relates to W wave band high performance receiving and dispatching radio frequency subassembly.

Background

For a radar detection system, the performance of the radio frequency transceiving component also determines the detection capability of the whole radar. At present, the design capability and the process level of a domestic 8mm radio frequency assembly are relatively mature, but a 3mm frequency band transceiver assembly is in a design and attack stage, along with the increasing investment of a domestic top-level microwave radio frequency assembly research and development unit and the prohibition of instruments below Agilent 500GHz on continents, the localization of a W-band radio frequency assembly is expected to be realized within 1-2 years in the future.

If a frequency modulation source is developed by adopting a traditional VCO (voltage controlled oscillator) mode, the transmission spurious of a system is poor, and the spurious amplitude modulation is difficult to eliminate. If a DDS + up-conversion mode is adopted, the cost is high, the size is large, the power consumption is high, and the DDS + up-conversion device is not suitable for being used by a vehicle-mounted anti-collision radar.

SUMMERY OF THE UTILITY MODEL

The utility model provides a W wave band high performance receiving and dispatching radio frequency subassembly, the circuit is succinct, low cost, and the commonality is strong.

In order to achieve the above object, the present invention provides a W-band high-performance rf transceiver module, which comprises a rf receiving module and a rf transmitting module; the radio frequency transmitting assembly is characterized by comprising:

a temperature compensation type quartz crystal resonator;

a phase-locked loop connected with the output end circuit of the temperature compensation type quartz crystal resonator;

a first multiplier connected to the output end of the phase-locked loop;

a second multiplier connected to the output circuit of the first multiplier;

an active bias controller connected to the output circuit of the second multiplier;

and the transmitting antenna is connected with the output end circuit of the active bias controller and is used for transmitting W-band wireless signals.

The phase-locked loop comprises:

a reference frequency source;

the phase discriminator is connected with the output end circuit of the reference frequency source;

a loop filter connected with the output end circuit of the phase discriminator;

the voltage-controlled oscillator is connected with the output end circuit of the loop filter and outputs signals to the first multiplier; and the number of the first and second groups,

and the voltage-controlled oscillator is connected to the phase discriminator through the program frequency divider circuit.

The first multiplier described above employs an effective x 2 frequency multiplier.

The second multiplier adopts a passive x 3 frequency multiplier.

The radio frequency receiving assembly comprises:

a receiving antenna for receiving a W-band wireless signal;

a low noise amplifier connected to the output circuit of the receiving antenna;

a mixer connected to the output circuit of the low noise amplifier;

and the high-linearity gain module is connected with the output end circuit of the mixer.

The utility model discloses a W wave band high performance receiving and dispatching radio frequency subassembly and the W wave band high performance receiving and dispatching radio frequency subassembly of prior art of the existing frequency modulation source based on phase-locked loop compare, its advantage is in, the utility model discloses the circuit is succinct, and is lower to voltage controlled oscillator VCO performance requirement, and the debugging is convenient, and can produce the signal waveform of various differences in a flexible way, therefore has advantages such as low cost, commonality are strong in the engineering, so say that a frequency modulation continuous wave signal production facility that has potentiality and advantage.

Drawings

Fig. 1 is a circuit block diagram of a radio frequency receiving component of the W-band high-performance transceiving radio frequency component of the present invention;

fig. 2 is a circuit block diagram of the rf transmitting assembly of the W-band high-performance rf transceiving assembly of the present invention;

fig. 3 is a circuit block diagram of the phase-locked loop of the W-band high-performance rf transceiver module according to the present invention;

fig. 4 is the PFD ideal characteristic curve of the phase discriminator of the W-band high-performance rf transceiver module of the present invention.

Detailed Description

The following describes the embodiments of the present invention with reference to the accompanying drawings.

The utility model discloses a W wave band high performance receiving and dispatching radio frequency assembly's embodiment explains a 77GHZ microwave receiving and dispatching subassembly based on the linear frequency modulation source of phase-locked loop in this embodiment, and this microwave receiving and dispatching subassembly contains radio frequency receiving assembly and radio frequency transmission subassembly.

As shown in fig. 1, the rf receiving module includes: a receiving antenna 24 for receiving W-band wireless signals, a low noise amplifier 23 electrically connected to an output terminal of the receiving antenna 24, a mixer 22 electrically connected to an output terminal of the low noise amplifier 23, and a high linearity gain block 21 electrically connected to an output terminal of the mixer 22. Wherein the low noise amplifier 23 adopts an HMC-ALH508 chip. The mixer 22 uses HMC-MDB277 chips and receives a 77GHZ LO signal. The high linearity gain module 21 employs an HMC580ST 89.

As shown in fig. 2, the rf transmitting component includes: the temperature compensation type quartz crystal resonator 11 (TCXO), a phase-locked loop 12 connected to the output end circuit of the temperature compensation type quartz crystal resonator 11, a first multiplier 13 connected to the output end circuit of the phase-locked loop 12, a second multiplier 14 connected to the output end circuit of the first multiplier 13, an active bias controller 15 connected to the output end circuit of the second multiplier 14, a transmission antenna 16 connected to the output end circuit of the active bias controller 15, and the transmission antenna 16 for transmitting a W-band wireless signal.

The active bias controller 15 adopts an HMC-AUH320 chip. The first multiplier 13 employs an active x 2 frequency multiplier HMC576LC3B chip. The second multiplier 14 employs a passive x 3 frequency multiplier HMC-XTB110 chip.

As shown in fig. 3, the phase-locked loop 12 includes: a reference frequency source 121, a phase detector 122 in circuit connection with an output of the reference frequency source 121, a loop filter (LPF) 123 in circuit connection with an output of the Phase Detector (PD) 122, a Voltage Controlled Oscillator (VCO) 124 in circuit connection with an output of the loop filter 123, and a program frequency divider (/ M) 125, the voltage controlled oscillator 124 being in circuit connection with the phase detector 122 through the program frequency divider 125. The voltage controlled oscillator 124 is used for outputting a signal to the first multiplier 13.

The phase locked loop 12 is a phase negative feedback system, which is different from the normalSee voltage or current negative feedback systems. The phase detector 122 always compares the phase of the input reference signal with the phase of the feedback signal, and when the two phase differences remain constant or zero (depending on the type of phase detector), the loop enters a steady state indicating that the phase is locked, and the frequency of the output signal is equal to the frequency of the input signal multiplied by the division ratio M, i.e. the frequency of the input signal is multiplied by the division ratio M

Wherein

A reference frequency output by a phase-locked loop reference frequency source 121; otherwise, the phase detector 122 continues to perform phase comparison and outputs a signal

Is low-pass filtered by a loop filter 123 to become a direct current signal

The frequency of the output signal of the voltage controlled oscillator 124 is controlled to approach the reference frequency until locked.

A Phase Detector 122 is an important block in the Phase locked loop. Its main function is to detect the phase difference (sometimes frequency difference) between the input reference signal and the output signal of the voltage controlled oscillator and to generate an output signal proportional to this phase difference (or frequency difference). The performance of the phase detector determines the accuracy of the phase locked loop and has a certain influence on its stability. Its linear model is:

wherein

Is the gain of the phase detector and,is the phase error between the output signal of the voltage controlled oscillator via the frequency divider and the PLL input reference signal. The condition for the linear model expressed by the above formula to be satisfied is the phase error

Small enough to be within the linear range of the phase detector.

PFDs operate on a similar principle to differential amplifiers, both of which detect the difference between two input signals and produce an output signal proportional thereto. As shown in fig. 4, the average output of the PFD is within the phase detection range

And two inputs

And

the phase difference between them is linearly proportional, as shown in equation (3), where K is the gain of the PFD.

A Voltage Controlled Oscillator (VCO) 124 is a core unit in the PLL, and is also a unit with the highest operating frequency, and changes the frequency of an output signal by changing the dc tuning Voltage at an input terminal, where the output frequency of the VCO is expressed as follows:

wherein,

is the free-running frequency of the VCO,

is the control voltage at the input of the VCO.

For its voltage-controlled gain, it refers to the variation of the VCO output frequency per unit voltage, typically in [ Hz/V ]]. Ideally, the voltage-controlled gain is required to be constant, i.e. the input voltage and the output frequency should maintain a good linear relationship, and in the design of the actual PLL frequency synthesizer,

and are difficult to be constant.

When the loop is in a locked state, the output frequency is the same as the input frequency, and a steady state phase difference exists between the two. If the input signal has a phase or frequency change (caused by interference or modulation), the output signal of the loop, i.e. the voltage-controlled oscillation frequency and phase, will track the change of the input signal through the control action of the loop itself, which is the tracking characteristic of the loop.

While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims

1. A W-band high-performance radio frequency transceiver module comprises a radio frequency receiving module and a radio frequency transmitting module; wherein the radio frequency transmitting assembly comprises:

a temperature compensation type quartz crystal resonator (11);

a phase-locked loop (12) which is connected with the output end circuit of the temperature compensation type quartz crystal resonator (11);

a first multiplier (13) connected to an output of the phase locked loop (12);

a second multiplier (14) connected to an output of the first multiplier (13);

an active bias controller (15) connected to an output of the second multiplier (14);

and the transmitting antenna (16) is connected with the output end circuit of the active bias controller (15), and the transmitting antenna (16) is used for transmitting W-band wireless signals.

2. The W-band high performance rf transceiver component of claim 1, wherein the phase locked loop (12) comprises:

a reference frequency source (121);

a phase detector (122) connected to an output end of the reference frequency source (121);

the loop filter (123) is connected with the output end of the phase detector (122) in a circuit mode;

a voltage controlled oscillator (124) electrically connected to an output of said loop filter (123), said voltage controlled oscillator (124) outputting a signal to a first multiplier (13); and the number of the first and second groups,

and the voltage controlled oscillator (124) is connected to the phase detector (122) through a circuit of the program frequency divider (125).

3. The W-band high performance rf transceiver module of claim 1, wherein the first multiplier (13) is an effective x 2 frequency multiplier.

4. The W-band high performance rf transceiver component of claim 1, wherein the second multiplier (14) is a passive x 3 frequency multiplier.

5. The W-band high performance rf transceiver module of claim 1, wherein the rf receiver module comprises:

a receiving antenna (24) for receiving a W-band wireless signal;

a low noise amplifier (23) connected to an output terminal of the receiving antenna (24);

a mixer (22) which is connected with the output end circuit of the low noise amplifier (23);

a high linearity gain module (21) in circuit connection with an output of the mixer (22).