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Microstrip filter circuit, microstrip duplexer and related electronic device

A microstrip filter and duplexer technology, applied in waveguide-type devices, circuits, electrical components, etc., can solve the problems of non-closing, large insertion loss, etc., and achieve low insertion loss, low signal power loss, and high signal efficiency. Effect

Active Publication Date: 2018-09-25
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a microstrip filter circuit, a microstrip duplexer and related electronic devices to solve the problem that the passband of the existing dual-passband filter cannot be closed and the insertion loss is large

Method used

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  • Microstrip filter circuit, microstrip duplexer and related electronic device
  • Microstrip filter circuit, microstrip duplexer and related electronic device
  • Microstrip filter circuit, microstrip duplexer and related electronic device

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Embodiment Construction

[0048] The structures of the microstrip filter circuit, the microstrip duplexer and related electronic devices provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0049] see figure 2 , is a schematic structural diagram of a microstrip filter circuit provided in an embodiment of the present application. The microstrip filter circuit mainly includes two half-wavelength (λ / 2) resonant circuits with the same structure and an open line.

[0050] Wherein, each half-wavelength resonant circuit includes a first section of microstrip line, a second section of microstrip line and a third section of microstrip line in series; the end of the first section of microstrip line passes through the first variable capacitance C b Grounded, the end of the third microstrip line passes through the second variable capacitor C r Grounding; the common end of the first section microstrip line and the second section mi...

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Abstract

The embodiment of the invention discloses a microstrip filter circuit, a microstrip duplexer and a related electronic device. Not only the adjustment of the central frequencies of double pass bands can be achieved through the adjustment of the capacitance of a variable capacitor connected to a tail end of a microstrip line in series while the double pass bands are achieved, but also an effect of enabling one of the double pass bands to fail can be achieved, i.e., achieving the independent adjustment of the double pass bands and pass band switching. Therefore, the intelligent control of the microstrip filter circuit can be achieved through the combination of a corresponding digital circuit or digital control device, including digital control on / off and digital control frequency selection, thereby easily obtaining a signal required by a digital device, optimizing the performances of the device, and improving the efficiency of the device. In addition, compared with a conventional circuitstructure, the circuit is also small in pass band insertion loss and signal power loss and is high in signal efficiency of a system besides an independent controllable switch.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular to a microstrip filter circuit, a microstrip duplexer and related electronic devices. Background technique [0002] As the functions and quantity of wireless communication devices increase, the demand for receiving and processing signals of various frequency bands is also increasing. Compared with configuring multiple fixed filters with different working frequency bands in wireless communication equipment, the application of filters with multiple independently adjustable working frequency bands (pass bands) and pass bands can be closed to achieve selective reception of multi-band signals, both The number of channels for simultaneous communication can be selected, and the frequency band of the channels can be selected, thereby saving costs, reducing the number of filters in the wireless communication device, and reducing the space occupied by the filter in th...

Claims

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Application Information

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IPC IPC(8): H01P1/203H03H7/01H03H7/46
CPCH01P1/20363H03H7/0153H03H7/463
Inventor 田震钱慧珍罗讯
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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