CN212726945U - Ultra-wideband image rejection mixing circuit - Google Patents
Ultra-wideband image rejection mixing circuit Download PDFInfo
- Publication number
- CN212726945U CN212726945U CN202022052678.8U CN202022052678U CN212726945U CN 212726945 U CN212726945 U CN 212726945U CN 202022052678 U CN202022052678 U CN 202022052678U CN 212726945 U CN212726945 U CN 212726945U
- Authority
- CN
- China
- Prior art keywords
- frequency
- ghz
- signal input
- image
- input module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to an ultra wide band image suppression mixing circuit, include: the device comprises a radio frequency signal input module, a first frequency mixing module, a second frequency mixing module, a local oscillator signal input module and an intermediate frequency signal output module. The first mixing module comprises: a first bandpass filter, a first image mixer, and a first bridge; the second mixing module comprises: a second bandpass filter, a second image mixer, and a second bridge. Above-mentioned ultra wide band image rejection mixer circuit constructs neotype mixer circuit, under the circumstances of guaranteeing work at ultra wide band frequency range, obtain higher image rejection performance and in-band fluctuation for the receiver circuit can be under the circumstances that does not use the image rejection wave filter or reduce to use the wave filter, has higher image rejection circuit, simplifies receiving circuit, especially saves complicated switch filtering group circuit in ultra wide band receiving circuit, and simple structure is practical, and is with low costs, and the volume is less, the integration of being convenient for.
Description
Technical Field
The utility model relates to a radio frequency transceiver circuit technical field especially relates to an ultra wide band image suppression mixing circuit.
Background
In a radio frequency transceiving system circuit, an image frequency signal is two signals which are mirror symmetric with a local oscillator signal, the two signals and the local oscillator signal can be mixed to obtain an intermediate frequency signal, when the image frequency signal enters the system, an interference signal with the same frequency as a useful signal can be obtained, and the problem of harmonic interference dominant frequency is caused. For example, the image frequency signal falls into the radio frequency receiving bandwidth, and is mixed to the intermediate frequency after passing through the mixer, so that the image frequency signal and the useful signal are mixed again, and serious interference is generated, and normal receiving cannot be performed. Therefore, in the microwave receiving circuit, the receiving front end needs to perform image rejection (image frequency rejection) to remove interference of the image signal.
In a conventional microwave receiving circuit, a band-pass filter is generally introduced at a receiving front end to filter an image frequency signal, so as to play a role in image rejection, thereby achieving the purpose of reducing interference. If the receiving bandwidth is very wide, a switch filter group is often needed to filter out the out-of-band image frequency signal, so that the number of segments is very large, the circuit is complex, the cost is very high, and the size is large.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides an ultra wide band image rejection mixer circuit constructs neotype mixer circuit, under the circumstances of guaranteeing work at ultra wide band frequency range, obtain higher image rejection performance and in-band fluctuation for the receiver circuit can be under the circumstances that does not use image rejection filter or reduce to use the wave filter, higher image rejection circuit has, simplify receiving circuit, especially save complicated switch filter group circuit in ultra wide band receiving circuit, moreover, the steam generator is simple in structure and practical, and is low in cost, and the volume is less, and is convenient for integrate.
An ultra-wideband image reject mixer circuit, comprising:
a radio frequency signal input module; the radio frequency signal input module is used for receiving radio frequency signals and selecting corresponding output ends to output according to the frequency bands of the received radio frequency signals;
the first frequency mixing module is connected with the radio frequency signal input module; the first mixing module comprises: the first band-pass filter is connected with a first output end of the radio-frequency signal input module, the first image mixer is connected with the first band-pass filter, and the first bridge is connected with an intermediate-frequency signal output end of the first image mixer;
the second frequency mixing module is connected with the radio frequency signal input module; the second mixing module comprises: the second band-pass filter is connected with the second output end of the radio-frequency signal input module, the second image mixer is connected with the second band-pass filter, and the second bridge is connected with the intermediate-frequency signal output end of the second image mixer;
the local oscillator signal input module is connected between the first frequency mixing module and the second frequency mixing module; a first output end of the local oscillator signal input module is connected with a local oscillator signal input end of the first image mixer; the second output end of the local oscillator signal input module is connected with the local oscillator signal input end of the second image mixer; the local oscillation signal input module is used for receiving a local oscillation signal and selecting a corresponding output end to output according to the frequency band of the received local oscillation signal; and
the intermediate frequency signal output module is respectively connected with the first frequency mixing module and the second frequency mixing module; the intermediate frequency signal output module is respectively connected with the first bridge and the second bridge; the intermediate frequency signal output module receives the intermediate frequency signals output by the first mixing module and the second mixing module respectively and synthesizes and outputs the intermediate frequency signals.
According to the ultra-wideband image rejection mixing circuit, a received radio frequency signal is output in a segmented mode through the radio frequency signal input module, correspondingly, a local oscillator signal of a corresponding frequency band is input through the local oscillator signal input module, the received radio frequency signal and the local oscillator signal are correspondingly input into one of the first mixing module and the second mixing module according to the frequency band where the segmented radio frequency signal and the local oscillator signal are located, corresponding intermediate frequency signals are obtained after mixing and image rejection processing is carried out, and finally the intermediate frequency signals of all paths are synthesized and output through the intermediate frequency signal output module. Through the design, construct neotype mixer circuit, guaranteeing to work under the condition of ultra wide band frequency range, obtain higher image rejection performance and in-band undulant for the receiver circuit can be under the condition that does not use the image rejection wave filter or reduce to use the wave filter, has higher image rejection circuit, simplifies receiving circuit, especially saves complicated switch filtering group circuit in ultra wide band receiving circuit, and simple structure is practical, and is with low costs, and the volume is less, the integration of being convenient for.
In one embodiment, the frequency band of the radio frequency signal received by the radio frequency signal input module is 3 GHz-14 GHz, the frequency band of the radio frequency signal selected by the first output end of the radio frequency signal input module to be output is 3 GHz-8 GHz, and the frequency band of the radio frequency signal selected by the second output end of the radio frequency signal input module to be output is 7 GHz-14 GHz; the frequency band of the local oscillation signal received by the local oscillation signal input module is 4.8 GHz-15.8 GHz, the frequency band of the local oscillation signal output by the first output end of the local oscillation signal input module is 4.8 GHz-9.8 GHz, and the frequency band of the local oscillation signal output by the second output end of the local oscillation signal input module is 9.8 GHz-15.8 GHz.
In one embodiment, the radio frequency signal input module includes: a first single pole double throw switch.
In one embodiment, the local oscillator signal input module includes: a second single pole double throw switch.
In one embodiment, the intermediate frequency signal output module includes: a third single pole double throw switch.
In one embodiment, the first band pass filter is a MEMS filter; the second band pass filter is a MEMS filter. The MEMS filter has small insertion loss, high suppression and small volume.
In one embodiment, the passband frequency of the first bandpass filter is 3 GHz-8 GHz, and the insertion loss is 2 dB; the passband frequency of the second band-pass filter is 8 GHz-14 GHz, and the insertion loss is 2 dB.
In one embodiment, the radio frequency local oscillator working frequency of the first image mixer is 3 GHz-8 GHz, the intermediate frequency DC-3GHz, and the maximum value of the image frequency suppression full frequency band is 30 dB; the radio frequency local oscillator working frequency of the second image mixer is 7 GHz-14 GHz, the intermediate frequency DC-3GHz, and the maximum value of the image frequency suppression full frequency band is 30 dB.
In one embodiment, the first bridge and the second bridge are both 90 ° bridges.
In one embodiment, the working frequency of the first electric bridge is 1.2 GHz-2.4 GHz, the amplitude unevenness is 0.1dB, and the phase is inconsistent by 2 degrees; the working frequency of the second electric bridge is 1.2 GHz-2.4 GHz, the amplitude unevenness is 0.1dB, and the phase is inconsistent by 2 degrees.
Drawings
Fig. 1 is a schematic diagram of an ultra-wideband image rejection mixer circuit according to an embodiment of the present invention;
fig. 2 is an example of an application of the ultra-wideband image rejection mixer circuit shown in fig. 1.
The meaning of the reference symbols in the drawings is:
100-ultra wide band image rejection mixer circuit;
10-a radio frequency signal input module;
20-a first mixing module, 21-a first band pass filter, 22-a first image mixer, 23-a first bridge;
30-a second mixing module, 31-a second band-pass filter, 32-a second image mixer, 33-a second bridge;
40-local oscillator signal input module;
and 50-an intermediate frequency signal output module.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As shown in fig. 1 and fig. 2, it is an ultra-wideband image rejection mixer circuit 100 according to an embodiment of the present invention.
In this embodiment, the ultra-wideband image rejection mixer circuit 100 is designed to have a high local oscillation frequency, and the frequency of the image frequency corresponding to the radio frequency signal is the sum of the frequencies of the intermediate frequency signal and the local oscillation signal.
As shown in fig. 1, the ultra-wideband image reject mixer circuit 100 includes: the radio frequency signal input module 10, the first frequency mixing module 20 connected to the radio frequency signal input module 10, the second frequency mixing module 30 connected to the radio frequency signal input module 10, the local oscillator signal input module 40 connected between the first frequency mixing module 20 and the second frequency mixing module 30, and the intermediate frequency signal output module 50 connected to the first frequency mixing module 20 and the second frequency mixing module 30, respectively.
As shown in fig. 1, the rf signal input module 10 is configured to receive an rf signal and select a corresponding output end according to a frequency band of the received rf signal for output. Further, in the present embodiment, the rf signal input module 10 has an input end and two output ends corresponding to different frequency bands. When a radio frequency signal enters from the input end of the radio frequency signal input module 10, one of the two output ends is selected for output according to the preset frequency band division.
As shown in fig. 1, the first mixing module 20 includes: a first band-pass filter 21 connected to a first output terminal of the rf signal input module 10, a first image mixer 22 connected to the first band-pass filter 21, and a first bridge 23 connected to an intermediate frequency signal output terminal of the first image mixer 22.
As shown in fig. 1, the second mixing module 30 includes: a second band-pass filter 31 connected to the second output terminal of the rf signal input module 10, a second image mixer 32 connected to the second band-pass filter 31, and a second bridge 33 connected to the intermediate frequency signal output terminal of the second image mixer 32.
As shown in fig. 1, a first output terminal of the local oscillator signal input module 40 is connected to a local oscillator signal input terminal of the first image mixer 22. A second output terminal of the local oscillator signal input module 40 is connected to a local oscillator signal input terminal of the second image mixer 32. The local oscillation signal input module 40 is configured to receive a local oscillation signal and select a corresponding output terminal according to a frequency band of the received local oscillation signal for output. While the radio frequency signal is processed in a segmented manner, the corresponding local oscillator signal needs to be input to implement the frequency mixing and image rejection processing, so in this embodiment, the local oscillator signal input module 40 has one input end and two output ends corresponding to different frequency bands, corresponding to the dual output design of the radio frequency signal input module 10. When a local oscillation signal enters from the input end of the local oscillation signal input module 40, one of the two output ends is selected for output according to the preset frequency division.
As shown in fig. 1, the intermediate frequency signal output module 50 is connected to the first bridge 23 and the second bridge 33, respectively. The intermediate frequency signal output module 50 receives the intermediate frequency signals output by the first and second mixing modules 20 and 30, respectively, and synthesizes and outputs the signals.
The working principle is as follows: the received radio frequency signal is outputted in a segmented manner through the radio frequency signal input module 10, correspondingly, the local oscillator signal of the corresponding frequency band is inputted through the local oscillator signal input module 40, and is correspondingly inputted to one of the first frequency mixing module 20 and the second frequency mixing module 30 according to the frequency band where the segmented radio frequency signal and the local oscillator signal are located, so as to obtain the corresponding intermediate frequency signal after frequency mixing and image rejection processing, and finally, the intermediate frequency signals of each path are synthesized and outputted through the intermediate frequency signal output module 50. Because the broadband is output in two sections, the design difficulty of the flatness in the internal circuit band is reduced, and small fluctuation in the radio frequency band can be realized.
Preferably, the frequency band of the radio frequency signal received by the radio frequency signal input module 10 is 3GHz to 14GHz, the frequency band where the radio frequency signal selected by the first output end of the radio frequency signal input module 10 is output is 3GHz to 8GHz, and the frequency band where the radio frequency signal selected by the second output end of the radio frequency signal input module 10 is output is 7GHz to 14 GHz. The frequency band of the local oscillation signal received by the local oscillation signal input module 40 is 4.8 GHz-15.8 GHz, the frequency band of the local oscillation signal output by the first output end of the local oscillation signal input module 40 is 4.8 GHz-9.8 GHz, and the frequency band of the local oscillation signal output by the second output end of the local oscillation signal input module is 9.8 GHz-15.8 GHz.
Preferably, the radio frequency signal input module 10 includes: a first single pole double throw switch. Furthermore, the working frequency of the first single-pole double-throw switch is DC-20GHz, the isolation is 45dB, and the insertion loss is 2 dB.
Preferably, the local oscillator signal input module 40 includes: a second single pole double throw switch. Furthermore, the working frequency of the second single-pole double-throw switch is DC-20GHz, the isolation is 45dB, and the insertion loss is 2 dB.
Preferably, the intermediate frequency signal output module 50 includes: a third single pole double throw switch. Furthermore, the working frequency of the second single-pole double-throw switch is DC-20GHz, the isolation is 45dB, and the insertion loss is 2 dB.
It should be noted that, in this embodiment, the radio frequency signal input module 10 and the local oscillator signal input module 40 may also be other structures that can selectively output according to the frequency band of the input signal. The intermediate frequency signal output module 50 may also be another structure capable of synthesizing and outputting multiple signals.
Preferably, the first band-pass filter 21 is a MEMS filter; the second band-pass filter 31 is a MEMS filter. The MEMS filter has small insertion loss, high suppression and small volume.
Preferably, the passband frequency of the first bandpass filter 21 is 3GHz to 8GHz, with an insertion loss of 2 dB. The passband frequency of the second band-pass filter 31 is 8 GHz-14 GHz, and the insertion loss is 2 dB.
Preferably, the radio frequency local oscillator operating frequency of the first image mixer 22 is 3GHz to 8GHz, the intermediate frequency DC-3GHz, and the maximum value of the image frequency suppression full band is 30 dB. The radio frequency local oscillator working frequency of the second image mixer 32 is 7 GHz-14 GHz, the intermediate frequency DC-3GHz, and the maximum value of the image frequency suppression full frequency band is 30 dB.
Preferably, the first bridge 23 and the second bridge 33 are both 90 ° bridges.
Preferably, the first bridge 23 has an operating frequency of 1.2GHz to 2.4GHz, an amplitude irregularity of 0.1dB, and a phase mismatch of 2 °. The working frequency of the second electric bridge 33 is 1.2 GHz-2.4 GHz, the amplitude unevenness is 0.1dB, and the phase is inconsistent by 2 degrees.
As shown in fig. 2, it is an example of an application based on the ultra-wideband image rejection mixer circuit 100 shown in fig. 1.
As shown in FIG. 2, the bandwidth of the radio frequency signal is 3 GHz-14 GHz, and the output in two sections is realized by the first SPDT1, which is respectively 3 GHz-8 GHz and 8 GHz-14 GHz. The local oscillation frequencies are respectively 4.8 GHz-9.8 GHz and 9.8 GHz-15.8 GHz. The intermediate frequency is 1.8GHz, and the intermediate frequency bandwidth is 1 GHz.
When the received signal works at 3 GHz-8 GHz, the radio frequency signal output by the first single-pole double-throw switch SPDT1 is filtered by the band-pass filter to remove out-of-band image frequency and interference, enters the first image rejection mixer, the mixed intermediate frequency signal is divided into I, Q paths, synthesized by the 90-degree first electric bridge 23, and output after the image frequency signal is removed. At this time, the input local oscillation signal works at 4.8 GHz-9.8 GHz, the center frequency of the intermediate frequency signal is 1.8GHz, and the intermediate frequency bandwidth is 1GHz, namely the intermediate frequency signal is 1.8 +/-0.5 GHz.
When the received signal works at 8 GHz-14 GHz, the radio frequency signal output by the first single-pole double-throw switch is filtered by the second band-pass filter 31 to remove out-of-band image frequency and interference, enters the second image rejection mixer, the mixed intermediate frequency signal is divided into I, Q paths, synthesized by the second electric bridge 33 at 90 degrees, and output after the image frequency signal is removed. At this time, the input local oscillation signal works at 9.8 GHz-15.8 GHz, the center frequency of the intermediate frequency signal is 1.8GHz, and the intermediate frequency bandwidth is 1GHz, namely the intermediate frequency signal is 1.8 +/-0.5 GHz.
Wherein the low-frequency band working mirror frequency is 6.6 GHz-11.6 GHz. The first bandpass filter 21 has some rejection of the high frequency part of the image frequency of this segment, and the low frequency part is determined by the image rejection mixing itself. The high frequency band working image frequency is 11.6 GHz-17.6 GHz. The second band-pass filter 31 has some rejection of the high frequency part of the image frequency of this segment, and the low frequency part is determined by the image rejection mixing itself.
After two sections of frequencies are mixed in a segmented mode, the two sections of frequencies are synthesized and output through a third SPDT3, and finally mixed frequency output in a frequency range of 3 GHz-14 GHz is achieved.
The image rejection circuit of the embodiment has the advantages that:
1. two dual-band image rejection mixers are integrated in the circuit, the frequency coverage of the mixers is very wide, the working frequency of a local oscillator and a radio frequency reaches 3 GHz-12 GHz, and the working frequency of an intermediate frequency is DC-3 GHz.
2. As a receiving down-conversion circuit mixer, two dual-band image rejection mixers are integrated in the circuit, the radio frequency image rejection degree of each mixer is high, and meanwhile, the frequency is divided into two waves for band-pass filtering, so that the full-band image rejection is high.
3. As a receiving down-conversion circuit mixer, two dual-band image rejection mixers are integrated in the circuit, each mixer has small in-band fluctuation, and the mixer is output in a segmented mode, so that the fluctuation in the full-band is small.
4. In a receiving circuit, the ultra-wideband image rejection mixing circuit 100 can work independently without a complex switch filtering component.
5. The ultra-wideband frequency mixing circuit adopts two built-in frequency mixers and is realized in a segmented mode, the design difficulty of a single frequency mixer is reduced, and the isolation degree, the frequency mixing loss and the image rejection index of a product are improved.
Above-mentioned ultra wide band image rejection mixer circuit 100 constructs neotype mixer circuit, under the circumstances of guaranteeing work at ultra wide band frequency range, obtain higher image rejection performance and in-band fluctuation for the receiver circuit can be under the circumstances that does not use the image rejection wave filter or reduce to use the wave filter, has higher image rejection circuit, simplify receiving circuit, especially save complicated switch filtering group circuit in ultra wide band receiving circuit, simple structure is practical, and is with low costs, and the volume is less, and is convenient for integrate.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An ultra-wideband image reject mixer circuit, comprising:
a radio frequency signal input module; the radio frequency signal input module is used for receiving radio frequency signals and selecting corresponding output ends to output according to the frequency bands of the received radio frequency signals;
the first frequency mixing module is connected with the radio frequency signal input module; the first mixing module comprises: the first bridge is connected with a first band-pass filter of a first output end of the radio-frequency signal input module, a first image mixer of the first band-pass filter and a first bridge of an intermediate-frequency signal output end of the first image mixer;
the second frequency mixing module is connected with the radio frequency signal input module; the second mixing module comprises: the second band-pass filter is connected with the second output end of the radio-frequency signal input module, the second image mixer is connected with the second band-pass filter, and the second bridge is connected with the intermediate-frequency signal output end of the second image mixer;
the local oscillator signal input module is connected between the first frequency mixing module and the second frequency mixing module; a first output end of the local oscillator signal input module is connected with a local oscillator signal input end of the first image mixer; a second output end of the local oscillator signal input module is connected with a local oscillator signal input end of the second image mixer; the local oscillator signal input module is used for receiving local oscillator signals and selecting corresponding output ends to output according to the frequency bands of the received local oscillator signals; and
the intermediate frequency signal output module is respectively connected with the first frequency mixing module and the second frequency mixing module; the intermediate frequency signal output module is respectively connected with the first electric bridge and the second electric bridge; the intermediate frequency signal output module receives the intermediate frequency signals output by the first mixing module and the second mixing module respectively and synthesizes and outputs the intermediate frequency signals.
2. The UWB image rejection mixer circuit of claim 1, wherein the frequency band of the RF signal received by the RF signal input module is 3 GHz-14 GHz, the frequency band of the RF signal selected by the first output terminal of the RF signal input module to be output is 3 GHz-8 GHz, and the frequency band of the RF signal selected by the second output terminal of the RF signal input module to be output is 7 GHz-14 GHz; the frequency band of the local oscillation signal received by the local oscillation signal input module is 4.8 GHz-15.8 GHz, the frequency band of the local oscillation signal output by the first output end of the local oscillation signal input module is 4.8 GHz-9.8 GHz, and the frequency band of the local oscillation signal output by the second output end of the local oscillation signal input module is 9.8 GHz-15.8 GHz.
3. The ultra-wideband image reject mixer circuit of claim 1 wherein the radio frequency signal input module comprises: a first single pole double throw switch.
4. The ultra-wideband image reject mixer circuit of claim 1 wherein the local oscillator signal input module comprises: a second single pole double throw switch.
5. The ultra-wideband image reject mixer circuit of claim 1 wherein the intermediate frequency signal output module comprises: a third single pole double throw switch.
6. The ultra-wideband image reject mixer circuit of claim 1 wherein the first bandpass filter is a MEMS filter; the second band-pass filter is a MEMS filter.
7. The ultra-wideband image rejection mixer circuit according to claim 1, wherein the passband frequency of said first bandpass filter is 3 GHz-8 GHz, the insertion loss is 2 dB; the passband frequency of the second band-pass filter is 8 GHz-14 GHz, and the insertion loss is 2 dB.
8. The ultra-wideband image rejection mixing circuit according to claim 1, wherein the radio frequency local oscillator operating frequency of the first image mixer is 3 GHz-8 GHz, the intermediate frequency DC-3GHz, and the maximum value of the image rejection full band is 30 dB; the radio frequency local oscillator working frequency of the second image mixer is 7 GHz-14 GHz, the intermediate frequency DC-3GHz, and the maximum value of the image frequency suppression full frequency band is 30 dB.
9. The ultra-wideband image reject mixer circuit of claim 1 wherein the first bridge and the second bridge are both 90 ° bridges.
10. The UWB image rejection mixer circuit of claim 1 wherein the first bridge has an operating frequency of 1.2 GHz-2.4 GHz, an amplitude irregularity of 0.1dB, and a phase non-uniformity of 2 °; the working frequency of the second electric bridge is 1.2 GHz-2.4 GHz, the amplitude unevenness is 0.1dB, and the phase is inconsistent by 2 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022052678.8U CN212726945U (en) | 2020-09-18 | 2020-09-18 | Ultra-wideband image rejection mixing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022052678.8U CN212726945U (en) | 2020-09-18 | 2020-09-18 | Ultra-wideband image rejection mixing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212726945U true CN212726945U (en) | 2021-03-16 |
Family
ID=74943064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022052678.8U Active CN212726945U (en) | 2020-09-18 | 2020-09-18 | Ultra-wideband image rejection mixing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212726945U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123978A (en) * | 2022-01-24 | 2022-03-01 | 电子科技大学 | Terahertz low-noise miniaturized image frequency suppression transceiving front end based on heterogeneous integration |
| CN114584165A (en) * | 2022-01-24 | 2022-06-03 | 北京邮电大学 | High-image-rejection adjustable ultra-wideband superheterodyne receiving radio frequency front end |
-
2020
- 2020-09-18 CN CN202022052678.8U patent/CN212726945U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123978A (en) * | 2022-01-24 | 2022-03-01 | 电子科技大学 | Terahertz low-noise miniaturized image frequency suppression transceiving front end based on heterogeneous integration |
| CN114584165A (en) * | 2022-01-24 | 2022-06-03 | 北京邮电大学 | High-image-rejection adjustable ultra-wideband superheterodyne receiving radio frequency front end |
| CN114584165B (en) * | 2022-01-24 | 2023-03-24 | 北京邮电大学 | High-image-rejection adjustable ultra-wideband superheterodyne receiving radio frequency front end |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2852383C (en) | Electronically tunable filter | |
| CN212726945U (en) | Ultra-wideband image rejection mixing circuit | |
| CN109728835B (en) | Circuit device with high isolation for multi-band transceiving | |
| CN113225021B (en) | Ultra-wideband constant-temperature down converter | |
| CN210225363U (en) | Band-pass filter, receiver and communication device | |
| CN213937873U (en) | High-frequency module and communication device | |
| CN110995163B (en) | Fundamental wave mixing and harmonic mixing hybrid millimeter wave dual-band passive mixer | |
| CN104113356A (en) | Wireless communication unit, radio frequency module and method for tuning wireless communication unit | |
| Bandyopadhyay et al. | A bandwidth reconfigurable bandpass filter for ultrawideband and wideband applications | |
| CN214750803U (en) | Miniaturized broadband receiving and transmitting channel | |
| US8014466B2 (en) | Wide-band direct conversion transmission apparatus | |
| CN212517462U (en) | Tuning duplexer, radio frequency circuit and communication equipment | |
| CN110021803A (en) | There are three the ultra-wide band filters of trap frequency point for tool | |
| CN212727381U (en) | Ultra-wideband receiving frequency conversion circuit | |
| CN100446411C (en) | Low noise frequency demultiplier | |
| Orlenko et al. | Novel high-rejection LTCC diplexers for dual-band WLAN applications | |
| CN110061757A (en) | A kind of microwave broadband duplexer and microwave transmitting and receiving T unit | |
| CN114070219A (en) | Filter network for eliminating electromagnetic wave interference effect | |
| US7876175B2 (en) | Compact diplexer | |
| CN112072241A (en) | Tuning duplexer, radio frequency circuit and communication equipment | |
| CN114649670A (en) | Filtering antenna and base station | |
| CN219477941U (en) | C wave band binary channels width of cloth looks frequency conversion subassembly | |
| CN209897032U (en) | Multi-band radio frequency receiver | |
| CN111276777A (en) | Balun filter with balanced port free of reflection | |
| CN110620591A (en) | Frequency band splitter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |