A Switchable Planar Bandpass-Bandstop Filter

Abstract

The invention discloses a switchable plane surface bandpass-bandstop filter. The filter is manufactured on a double-surface-copper-covered micro band board in a printed circuit board manner; an input terminal feeder line head port1 for inputting electromagnetic wave signals, an output terminal feeder line head port 2 for outputting the electromagnetic wave signals, a first port feeder line, a second port feeder line, a first micro band resonator, a second micro band resonator, a third micro band resonator, a first radio frequency switch SW1 and a second radio frequency switch SW 2 are respectively manufactured on the same surface of the double-surface-copper-covered micro band board. For the switchable plane surface bandpass-bandstop filter realized through the plane surface structure, the purpose of controlling the states of the switches is achieved by controlling the power supply voltage of the radio frequency switches, so that the switching of filters can be controlled, and the center frequencies of a bandpass filter and a bandstop filter are consistent. The filter has the advantages that the bandpass filter and the bandstop filter can be switched, the center frequency is consistent, the structure is simple, and the size is small.

Description

technical field [0001] The invention relates to the technical field of planar microstrip filters, in particular to a switchable planar bandpass-bandstop filter. Background technique [0002] In recent years, the rapid development of wireless communication, the popularity of 3G technology, and the arrival of 4G all indicate that wireless technology will usher in a peak period of vigorous development. At the same time, with the popularity of wireless electronic products in people's lives, miniaturization and low cost have become the trend of electronic products. On the other hand, with the rapid development of electronic information, the increasingly scarce spectrum resources are becoming more and more scarce. In order to improve the communication capacity and reduce the signal crosstalk between adjacent channels, higher requirements are put forward for the selectivity and integration of filters. The microstrip filter meets these requirements. [0003] As a kind of microwave...

AI Technical Summary

Problems solved by technology

[0006] At the same time, the information also shows that in March 2014, the article "0.7-1.0-GHz Reconfigurable Bandpass-to-Bandstop Filter With Selectable 2-and 4-Pole Responses" by Young-Ho Cho and Gabriel M.Rebeiz has been accepted by the technical field The top journal "IEEE TRANSACTIONS ON MICROWAVE THEORYAND TECHNIQUES" is accepted and ready to be published. This article discloses a filter design, which can also switch between a band-pass filter and a band-stop filter through a radio frequency switch, but the filter There are disadvantages of complex structure

Images