Communication equipment and adjustable microstrip filter

Abstract

The invention discloses communication equipment and an adjustable microstrip filter, the adjustable microstrip filter comprises a dielectric substrate, at least a first microstrip line, a second microstrip line and a first switch element, wherein the surface of one side of the dielectric substrate is provided with a grounding conductive layer; at least the first microstrip line and the second microstrip line are arranged on the other surface, back to the grounding conducting layer, of the dielectric substrate, and the two ends of the first microstrip line are connected with a signal input end and a signal output end respectively; one end of the second microstrip line is connected between the input end and the output end, the other end of the second microstrip line is a first electrical suspension end, and the first switch element is coupled to a first preset position of the second microstrip line and used for controlling whether the effective length of the second microstrip line is stopped at the first preset position or not. Through the mode, the effective length of the second microstrip line can be changed under the action of an external control signal, so that the filter can output microwave signals with different frequencies, and the characteristic parameters of the filter are changed.

Description

technical field [0001] The present application relates to the field of microwave transmission technology, in particular to a communication device and an adjustable microstrip filter. Background technique [0002] Microstrip filters are usually used in radio frequency circuits, and are sometimes called microstrip line filters, specifically referring to filters built with microstrip lines. Typically, microstrip filters are fabricated on printed circuit boards. The microstrip line is a wire with a certain width. After the printing is completed, it means that the filter has been debugged and can be put into use. At this time, the length, width and thickness of the microstrip line are fixed. [0003] Because the various parameters of the microstrip line are fixed, the parameters of the filter cannot be adjusted during use. Therefore, if you need to adjust the parameters of the filter, you need to reprint a new circuit board according to the changes in the parameters. The product...

AI Technical Summary

Problems solved by technology

[0003] Because the various parameters of the microstrip line are fixed, the parameters of the filter cannot be adjusted during use. Therefore, if you need to adjust the parameters of the filter, you need to reprint a new circuit board according to the changes in the parameters. The production process If you make a new printed circuit board, it will be very time-consuming and laborious, and the cost will increase accordingly

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