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Tuning duplexer, radio frequency circuit and communication equipment

A duplexer and capacitor technology, applied in circuits, electrical components, waveguide-type devices, etc., can solve problems such as product communication quality problems, damage to communication systems, and radio frequency stray excess, achieving low cost, good selectivity, and insertion. Low loss effect

Pending Publication Date: 2020-12-11
SHENZHEN GONGJIN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of WIFI technology and wireless communication technology, the frequency spectrum is getting less and less, the division of frequency resources is becoming more and more refined, and the interference between frequency bands is becoming more and more serious. Therefore, the performance of the RF transceiver front-end filter often determines the communication system. quality, especially for multi-mode and frequency-division communication systems, because one port will input two or more signals of different frequencies, and the frequencies are adjacent or similar, and the signals are easily transmitted through the microstrip line to RF front-end, if these signals are not specially processed, it is easy to cause interference between links, sensitivity deterioration, and RF strays exceeding the standard, and more serious damage to the communication system, resulting in product communication quality problems

Method used

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  • Tuning duplexer, radio frequency circuit and communication equipment
  • Tuning duplexer, radio frequency circuit and communication equipment
  • Tuning duplexer, radio frequency circuit and communication equipment

Examples

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Embodiment 1

[0035] Please refer to figure 1 , this embodiment proposes a tuning duplexer 1, which can be applied to various radio frequency communication devices or communication systems. The tuner duplexer 1 will be described in detail below.

[0036] Exemplarily, the tuning duplexer 1 has a three-port structure, including a first input port P1, a second input port P2, and a common output port P3, wherein the two input ports are respectively used to feed electromagnetic wave signals of different frequency bands , and the common output port P3 is used to feed out electromagnetic wave signals. The tuning duplexer 1 also includes a low-pass filter 10, a high-pass filter 20, a first resonant unit 30, and a second resonant unit 40 located between the three ports, wherein the first input port P1, the low-pass filter The device 10 and the first resonant unit 30 are connected in sequence; the second input port P2, the high-pass filter 20 and the second resonant unit 40 are connected in sequenc...

Embodiment 2

[0048] Please refer to image 3 , based on the above-mentioned embodiment 1, for the tuned duplexer of this embodiment, on the basis of using an elliptical low-pass filter and a Butterworth high-pass filter, further, the elliptical low-pass filter will use a third-order Or an elliptical low-pass filter of order 3 or higher; a Butterworth high-pass filter of order 5 or higher will be used. Of course, in practical applications, an appropriate order can be selected according to actual needs to achieve a balance between cost and performance.

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Abstract

The embodiment of the invention provides a tuning duplexer, a radio frequency circuit and communication equipment. The tuning duplexer comprises a first input port, a second input port, a common output port, a low-pass filter, a high-pass filter, a first resonance unit, a second resonance unit and a combining unit, wherein the first input port and the second input port are used for feeding in signals of different frequency bands, and the common output port is used for feeding out signals. The first input port, the low-pass filter and the first resonance unit are connected in sequence, the second input port, the high-pass filter and the second resonance unit are connected in sequence, and the first resonance unit and the second resonance unit are combined by adopting a T-shaped structure and then are connected to the common output port. The tuning duplexer can suppress parasitic passbands on the low-pass filter, and has the characteristics of low insertion loss in the passband, high isolation, good out-of-band pole selectivity, wide stop band, low cost and the like.

Description

technical field [0001] The present application relates to the technical field of duplexers, in particular to a tuned duplexer, a radio frequency circuit and communication equipment. Background technique [0002] With the development of WIFI technology and wireless communication technology, the frequency spectrum is getting less and less, the division of frequency resources is becoming more and more refined, and the interference between frequency bands is becoming more and more serious. Therefore, the performance of the RF transceiver front-end filter often determines the communication system. quality, especially for multi-mode and frequency-division communication systems, because one port will input two or more signals of different frequencies, and the frequencies are adjacent or similar, and the signals are easily transmitted through the microstrip line to RF front-end, if these signals are not specially processed, it is easy to cause interference between links, sensitivity...

Claims

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Application Information

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IPC IPC(8): H01P1/212H01P1/20H03H7/46
CPCH01P1/20H01P1/212H03H7/463
Inventor 陈志军杜雅
Owner SHENZHEN GONGJIN ELECTRONICS CO LTD
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