Double-frequency-point cylinder conformal filter applied to WLAN, and manufacturing method of the same

Abstract

The invention discloses a double-frequency-point cylinder conformal filter applied to WLAN (Wireless Local Area Networks), and a manufacturing method of the same. The double-frequency-point cylinder conformal filter applied to WLAN includes a cylinder conformal pedestal (1), a substrate (2) and a double-order SIR filter (3), wherein the double-order SIR filter (3) is fixedly arranged on the substrate (2); the substrate (2) fixedly attaches to a conformal curved surface of the cylinder conformal pedestal (1); the cylinder conformal pedestal (1) can be finished through processing of a 3D printing technology, and the outer surface of the cylinder conformal pedestal (1) is a common cylindrical surface, and the cylinder conformal pedestal (1) can be applied to other conformal systems; the double-frequency-point cylinder conformal filter applied to WLAN uses the double-order stepped impedance resonator (SIR) filter to realize the filtering function; different two resonant points can be obtained through adjustment of width and length of two sections of microstrip lines, and at the same time the double-frequency filter is conductive to overall minimization of the system; the double-order SIR filter (3) uses the parallel coupling wire feeding mode to generate a plurality of transmission zero points so as to improve the outband inhibition performance.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter waves, and in particular relates to the design of a dual-frequency cylindrical conformal filter applied to WLAN and a manufacturing method thereof. Background technique [0002] With the advent of the information age, people have put forward higher requirements for wireless communication systems, and wireless local area networks (Wireless Local Area Networks, WLAN) is the product of the combination of computer network technology and wireless communication technology, which can greatly meet people's needs . The application frequency band of WLAN is mainly divided into two frequency bands of 2.4GHz and 5.2GHz. Therefore, 2.4GHZ and 5.2GHz under the IEEE 802.11b / g standard and IEEE 802.11a standard have become the working frequency bands of many transceivers. As the front end of the transceiver, the filter plays an irreplaceable role in frequency selection, interference isolation, s...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the design of the conventional conformal filter is difficult to effectively reduce the insertion loss while accurately modeling, and proposes a dual-frequency point cylindrical conformal filter applied to WLAN and its manufacturing method

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