CN211293264U

CN211293264U - Beidou anti-interference radio frequency assembly

Info

Publication number: CN211293264U
Application number: CN202021052725.2U
Authority: CN
Inventors: 张富强; 周文
Original assignee: Dongfang Huatong Science And Technology Co ltd
Current assignee: Dongfang Huatong Science And Technology Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2020-08-18
Anticipated expiration: 2030-06-09

Abstract

The utility model provides a big dipper anti-interference radio frequency assembly, including the preselection filter of BDS B3 frequency channel, the preselection filter of GPS L1 frequency channel, mixer, local oscillator and clock unit, signal processing unit and close way and merit divide the unit; the utility model realizes the filtering, amplification and frequency conversion of BDS B3 frequency band signals and the filtering and amplification of GPS L1 frequency band signals, and outputs 6 paths of radio frequency signals after combination and power division; outputting stable 62MHz clock signal; and then the utility model discloses have low noise, high suppression, high linearity, have very high isolation between the passageway, the complete machine consumption is not more than 10W low-power dissipation, therefore low-power dissipation can bear the power of burning out that reaches 2W, therefore anti the ability of burning out is strong to gain, phase place uniformity are good between the passageway.

Description

Beidou anti-interference radio frequency assembly

Technical Field

The utility model relates to an anti-interference radio frequency subassembly of big dipper.

Background

The prior similar technology mainly shows weak anti-interference capability, low receiving sensitivity and the like, has poor working stability and is difficult to meet the use requirements of customers. The technology adopted by the similar radio frequency assembly is as follows: the method comprises the steps that an external radio frequency signal is received by an antenna and then sent to a single-stage (or multi-stage) low-noise amplifying circuit to be amplified, a band-pass filter and a local oscillator signal are used for mixing to generate a beat signal, and a frequency scale is generated on a high-frequency circuit by utilizing resonance.

SUMMERY OF THE UTILITY MODEL

The utility model provides an anti-interference radio frequency subassembly of big dipper, mainly used realizes BDS B3 frequency point satellite navigation signal anti-jamming function with the cooperation of anti-interference processing board simultaneously to BDSB3 frequency point, the receipt of GPSL1 frequency point satellite navigation signal.

For solving the technical problem, the utility model discloses the technical scheme who takes:

the Beidou anti-interference radio frequency assembly comprises a preselection filter of a BDS B3 frequency band, a preselection filter of a GPS L1 frequency band, a frequency mixer, a local oscillator and clock unit, a signal processing unit and a combining and power dividing unit; the output signal of the preselection filter of the BDS B3 frequency band and the first carrier signal provided by the local oscillator and clock unit are jointly sent to the corresponding frequency mixer to realize down-conversion; the local oscillator and clock unit provides clock signals for the signal processing unit, and the signals after down-conversion are further subjected to down-conversion by the signal processing unit; the output signal of the signal processing unit and the second carrier signal provided by the local oscillator and clock unit are jointly sent to the corresponding frequency mixer to realize up-conversion; the up-converted signal and the output signal of the preselection filter of the GPS L1 frequency band are jointly sent into the combining and power dividing unit, and the combining and power dividing unit outputs the radio frequency signals of the multiple BDS B3/GPS L1 frequency bands.

Further, there are 4 preselection filters for the BDS B3 band and 1 preselection filter for the GPS L1 band.

Further, a low noise amplifier is arranged between the preselection filter of each BDS B3 frequency band and the corresponding mixer.

Further, a low noise amplifier is arranged between the preselection filter of the GPS L1 frequency band and the combining and power dividing unit.

Furthermore, all the low noise amplifiers and the mixers are integrated together, so that amplification and down-conversion of a 4-channel BDS B3 frequency band, up-conversion of a 1-channel BDS B3 frequency band and amplification of a 1-channel GPS L1 frequency band are realized.

Further, the first carrier signal is 1160 MHz; the signal processing unit down-converts the signal to 46.52 MHz; the second carrier signal is 1222 MHz.

Further, the clock signal is 62 MHz.

Further, the combining and power dividing unit outputs 6 paths of radio frequency signals in the BDS B3/GPS L1 frequency band in total.

Compared with the prior art, the invention has the following beneficial effects:

the utility model realizes the filtering, amplification and frequency conversion of BDS B3 frequency band signals and the filtering and amplification of GPS L1 frequency band signals, and outputs 6 paths of radio frequency signals after combination and power division; outputting stable 62MHz clock signal; and then the utility model discloses have low noise, high suppression, high linearity, have very high isolation between the passageway, the complete machine consumption is not more than 10W low-power dissipation, therefore low-power dissipation can bear the power of burning out that reaches 2W, therefore anti the ability of burning out is strong to gain, phase place uniformity are good between the passageway.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a connection block diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Therefore, the utility model provides a big dipper anti-interference radio frequency subassembly, including the preselection filter of BDS B3 frequency channel, the preselection filter of GPS L1 frequency channel, mixer, local oscillator and clock unit, signal processing unit and combination and merit divide the unit; the output signal of the preselection filter of the BDS B3 frequency band and the first carrier signal provided by the local oscillator and clock unit are jointly sent to the corresponding frequency mixer to realize down-conversion; the local oscillator and clock unit provides clock signals for the signal processing unit, and the signals after down-conversion are further subjected to down-conversion by the signal processing unit; the output signal of the signal processing unit and the second carrier signal provided by the local oscillator and clock unit are jointly sent to the corresponding frequency mixer to realize up-conversion; the up-converted signal and the output signal of the preselection filter of the GPS L1 frequency band are jointly sent into the combining and power dividing unit, and the combining and power dividing unit outputs the radio frequency signals of the multiple BDS B3/GPS L1 frequency bands. There are 4 preselection filters for the BDS B3 band and 1 preselection filter for the GPS L1 band. A low noise amplifier is also arranged between the preselection filter of each BDS B3 frequency band and the corresponding mixer. And a low noise amplifier is also arranged between the preselection filter of the GPS L1 frequency band and the combining and power dividing unit. All the low noise amplifiers and the mixers are integrated together, and amplification and down-conversion of a 4-channel BDS B3 frequency band, up-conversion of a 1-channel BDS B3 frequency band and amplification of a 1-channel GPS L1 frequency band are realized. The first carrier signal is 1160 MHz; the signal processing unit down-converts the signal to 46.52 MHz; the second carrier signal is 1222 MHz. The clock signal is 62 MHz. The combining and power dividing unit outputs 6 paths of radio frequency signals in BDS B3/GPSL1 frequency band in total.

The technical scheme provided by the utility model realizes filtering, amplification and frequency conversion of BDS B3 frequency band signals and filtering and amplification of GPS L1 frequency band signals, and outputs 6 paths of radio frequency signals after combination and power division; while outputting a stable 62MHz clock signal.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, a chirp transceiver module includes: the device comprises 4 BDS B3 frequency band preselection filters, 1 GPS L1 frequency band preselection filter, 5 Low Noise Amplifiers (LNA), 5 mixers (4 of which are used for down-conversion and 1 is used for up-conversion), a local oscillator and clock unit, a signal processing unit, a combining and power dividing unit; filtering, amplifying and frequency converting BDS B3 frequency band signals and filtering and amplifying GPS L1 frequency band signals in sequence, and outputting combined and power-divided 6-channel radio frequency signals; while outputting a stable 62MHz clock signal.

To sum up, the utility model realizes the filtering, amplification and frequency conversion of BDS B3 frequency band signals and the filtering and amplification of GPS L1 frequency band signals, and outputs 6 paths of radio frequency signals after combination and power division; outputting stable 62MHz clock signal; and then the utility model discloses have low noise, high suppression, high linearity, have very high isolation between the passageway, the complete machine consumption is not more than 10W low-power dissipation, therefore low-power dissipation can bear the power of burning out that reaches 2W, therefore anti the ability of burning out is strong to gain, phase place uniformity are good between the passageway.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. The Beidou anti-interference radio frequency component is characterized by comprising a preselection filter of a BDS B3 frequency band, a preselection filter of a GPS L1 frequency band, a frequency mixer, a local oscillator and clock unit, a signal processing unit and a combining and power dividing unit; the output signal of the preselection filter of the BDS B3 frequency band and the first carrier signal provided by the local oscillator and clock unit are jointly sent to the corresponding frequency mixer to realize down-conversion; the local oscillator and clock unit provides clock signals for the signal processing unit, and the signals after down-conversion are further subjected to down-conversion by the signal processing unit; the output signal of the signal processing unit and the second carrier signal provided by the local oscillator and clock unit are jointly sent to the corresponding frequency mixer to realize up-conversion; the up-converted signal and the output signal of the preselection filter of the GPS L1 frequency band are jointly sent into the combining and power dividing unit, and the combining and power dividing unit outputs the radio frequency signals of the multiple BDS B3/GPS L1 frequency bands.

2. The Beidou anti-jamming radio frequency module according to claim 1, wherein there are 4 preselection filters in the BDS B3 band and 1 preselection filter in the GPS L1 band.

3. The Beidou anti-interference radio frequency assembly according to claim 1 or 2, wherein a low noise amplifier is further arranged between the preselection filter of each BDS B3 frequency band and the corresponding mixer.

4. The Beidou anti-interference radio frequency assembly according to claim 3, wherein a low noise amplifier is further arranged between the preselection filter of the GPS L1 frequency band and the combining and power dividing unit.

5. The Beidou anti-jamming radio frequency module according to claim 4, wherein all low noise amplifiers and mixers are integrated together to realize amplification and down-conversion of a 4-channel BDS B3 frequency band, up-conversion of a 1-channel BDS B3 frequency band and amplification of a 1-channel GPS L1 frequency band.

6. The Beidou anti-jamming radio frequency assembly according to claim 1, wherein the first carrier signal is 1160 MHz; the signal processing unit down-converts the signal to 46.52 MHz; the second carrier signal is 1222 MHz.

7. The Beidou anti-jamming radio frequency assembly according to claim 1, wherein the clock signal is 62 MHz.

8. The Beidou anti-interference radio frequency assembly according to claim 1, wherein the combining and power dividing unit outputs 6 paths of radio frequency signals in BDS B3/GPS L1 frequency band in total.