Filter duplex antenna based on open-loop resonator

Abstract

The invention discloses a filter duplex antenna based on an open-loop resonator. The filter duplex antenna comprises a rectangular patch with a short-circuit post loaded in the middle, a stacked parasitic rectangular patch, a transmitting channel feed probe, a receiving channel feed probe, a reflective floor, a transmitting port, a receiving port, a transmitting channel feed network, and a receiving channel feed network. The rectangular patch is printed on an upper surface of an intermediate dielectric substrate; the stacked parasitic rectangular patch is printed on an upper surface of an upper dielectric substrate; the reflective floor is printed on an upper surface of a lower dielectric substrate; and the transmitting channel feed network and the receiving channel feed network are printed on the lower surface of the lower dielectric substrate. According to the filter duplex antenna, with introduction of the open-loop resonator as a feed network, the antenna has a filter duplex function and is capable of carrying out transmission and receiving simultaneously; and electromagnetic waves transmitted and received by the antenna are linear-polarization electromagnetic waves.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a filter duplex antenna based on an open-loop resonator. Background technique [0002] The antenna is a device for transmitting and receiving electromagnetic waves. The antenna feeder system is the front end of the wireless communication system and an indispensable key component of the wireless communication system. The antenna feed system includes antenna, filter and duplexer. The traditional method is to design the three separately, and then connect them with radio frequency cables, which makes the whole system bulky and heavy, especially the loss caused by the feeder and matching network will be huge. reduce the transmission efficiency of the signal. [0003] In modern mobile communication systems, in order to achieve compact structure, light weight, miniaturization, and good performance of the system, an integrated antenna-feeder system has become a developmen...

AI Technical Summary

Problems solved by technology

[0004] The current co-polarized duplex antennas have relatively large intervals between transmitting and receiving frequencies, low port isolation, and sometimes need to introduce a transmission zero point into the circuit to improve the isolation between transmitting and receiving, resulting in a complicated circuit structure and low antenna gain.

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