Binary-type bandwidth reconfigurable band-pass filter

Abstract

The invention discloses a binary-type bandwidth reconfigurable band-pass filter, relates to a strip-shaped line filter, and belongs to the technical field of basic electrical elements. The filter is arranged on a dielectric substrate, and is mainly composed of an input transmission line, an output transmission line, N quarter-wavelength resonators, and N+1 parallel coupling structures which are formed by end-connected switchable metal strip strips. The M end-connected switchable metal strip strips which are arranged in sequence are arranged in the center of each parallel coupling structure, and the two ends of each end-connected switchable metal strip are connected with PIN diode switches respectively, and are grounded through via holes, so that a bias voltage can be applied to PIN diodesthrough resistors which are vertically welded to the centers of the strips, and two ends of the metal strips can be switched between two states of open circuit and short circuit. The 2M groups of coupling coefficients can be realized through M control voltages, so that the bandwidths of the 2M filters can be realized, that is, the binary-type bandwidth reconfigurable band-pass filter is achieved.

Description

technical field [0001] The invention discloses a bandpass filter with reconfigurable binary bandwidth, relates to a stripline filter and belongs to the technical field of basic electrical components. Background technique [0002] Currently, widely used filters are non-adjustable and have fixed functions. Therefore, a large number of filters with different bandwidth indexes are required to form a wireless communication system, which increases the complexity and volume of the wireless communication system. [0003] With the rapid development of wireless communication technology, spectrum resources are becoming more and more scarce. In order to make full use of very limited spectrum resources, wireless communication equipment widely uses technologies such as frequency hopping, spread spectrum, and frequency dynamic allocation, and there are emerging technologies that support multiple communication Standard reconfigurable communication systems, these technologies and an indispen...

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Problems solved by technology

[0005] The purpose of the present invention is to address the shortcomings of the above-mentioned background technology, to provide a bandpass filter with a binary bandwidth reconfigurable, and to realize a binary bandwidth reconfigurable with the number of control voltages as an index through a limited number of control voltages The bandpass filter solves the technical problem that the existing bandwidth reconfigurable scheme is not suitable for narrowband filters and has a large insertion loss

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