Double-band filter antenna with anti-interference feature

Abstract

The invention provides a double-band filter antenna with an anti-interference feature. The double-band filter antenna is composed of a monopole antenna body and a double-band filter, and the double-band filter antenna is printed on the front face of a dielectric substrate. The monopole antenna body comprises a monopole, a rectangular ring is loaded at the top of the monopole, and two semicircular rings are loaded in the middle of the monopole. The double-band filter is of an interdigital structure. Coupling wires are arranged at the two ends of the double-band filter, and the coupling wires are formed by connecting narrow coupling wires and wide coupling wires. Coupling connecting wires are arranged on the upper portion and the lower portion of the double-band filter. An input end feeder of the double-band filter is connected with the coupling connecting wire on the lower portion, and an output end feeder of the double-band filter is connected with the coupling connecting wire on the upper portion. A metal earth plate is arranged on the back face of the dielectric substrate, and the metal earth plate is provided with a rectangular groove. The double-band filter and the antenna body are integrated, the antenna body is minimized, the antenna can work at the frequency bands with the WLAN of 2.45 GHz and 5.2 GHz at the same time, the good feature is achieved, the antenna has the good out-of-band rejection performance outside the frequency bands, and interference of out-of-band signals is effectively isolated.

Description

technical field [0001] The invention belongs to the field of electromagnetic compatibility and antenna technology, and in particular relates to a miniaturized dual-frequency filter antenna with anti-interference characteristics. Background technique [0002] With the rapid development of modern mobile communication, wireless communication plays an increasingly important role in people's work and life. At the same time, many wireless standards continue to go out of the laboratory and are then applied to actual production and life. For example, the wireless local area network (WLAN) service that has now entered thousands of households. According to the IEEE802.11b / a standard, its working frequency band is 2.4- 2.4835GHz and 5.15-5.35GHz. However, with the increase of people's demand for wireless communication and the limitation of limited spectrum resources, the frequency interval between various wireless standards is too narrow, which is easy to cause mutual interference. 2...

AI Technical Summary

Problems solved by technology

However, the above-mentioned research methods have only carried out research on single-band filter antennas, and have not carried out research on dual-band filter antennas that can be widely used in dual-passband communication systems

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