Planar multi-port high-isolation broadband triplexer integrated antenna

Abstract

The invention discloses a planar multi-port high-isolation broadband triplexer integrated antenna, which belongs to the field of antennas. The antenna is based on a single-layer dielectric plate, the lower surface of the antenna is a grounding metal patch, two symmetrical square grooves are etched, and the two square grooves are connected through a gap strip to form a dumbbell-shaped groove; the upper surface is provided with a partial feed structure and is provided with three ports; the feed network of the first port and the feed network of the third port are located on the top layer of the dielectric plate, the feed lines are perpendicular to each other, the feed network of the second port is right opposite to the third port, and the feed network of the second port and the ground plane are jointly attached to the bottom layer of the dielectric plate; the first port is slot coupling feeding and is composed of a feeder line and a stepped impedance resonator; the second port is coplanar waveguide feed and comprises a feeder line and symmetrical Y-shaped microstrip branches; the third port is a coupling feed port and comprises a feed microstrip line and a T'-shaped microstrip line stub, the three feed ports are excited at the same time, simultaneous sending and receiving of the antenna are achieved, and different feed modes are beneficial to achieving high port isolation.

Description

technical field [0001] The invention belongs to the field of antennas, and relates to a passive radio frequency front-end device, in particular to a planar multi-port high-isolation broadband triplex integrated antenna. Background technique [0002] With the popularization of wireless communication technology, from military communication to commercial radio to civilian radio, people's living conditions have been greatly improved, and it plays an important role in the rapid development of productivity. [0003] As an important factor in promoting human scientific progress in the information society, wireless mobile communication technology has met the needs of applications in different scenarios and various customers through continuous evolution, update and integration in recent years. Taking the mobile phone most commonly used in civil wireless communication as an example, through the development and iteration of the second generation (2G), third generation (3G) and fourth g...

AI Technical Summary

Problems solved by technology

However, since the multiplexing system of the mobile terminal has high requirements for miniaturization, the size limitation will inevitably lead to the distance between multiple antennas not meeting the ideal requirements, and the performance of the system will also be reduced.

[0005] In a multiplexing system, an antenna is required to have multi-frequency and multiplexing characteristics. The traditional multiplexing antenna is composed of a multi-frequency antenna and a multiplexer cascaded. The isolation between the ports of this type of structure is realized by the multiplexer. Not only The design of multiplexers is more demanding, and at the same time, it cannot meet the size requirements of small integrated mobile terminals under the rapid development of mobile communication technology

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