Dual-frequency antenna and terminal thereof

Abstract

The invention discloses a dual-frequency antenna and a terminal thereof, and belongs to the field of antennas. The dual-frequency antenna comprises a spiral arm irradiator, a phase power divider, a circular-polarization / linear-polarization combiner, a co-module / difference-module combiner, and a RF feeder. The spiral arm irradiator is connected with the phase power divider. The circular-polarization / linear-polarization combiner is parallelly connected with the phase power divider, and connected to the co-module / difference-module combiner through the RF feeder. A linear-polarization signal is transmitted to the circular-polarization / linear-polarization combiner along the RF feeder in a co-module mode, and a circular-polarization signal is transmitted to the phase power divider along the RF feeder in a difference-module mode. The provided dual-frequency antenna and the terminal thereof are used for adding the linear-polarization signal in the case without changing the circular-polarization volume of the satellite antenna, multiplexing the circular-polarization antenna and a linear-polarization radiation oscillator, and solving a coexisting problem of the cluster linear-polarization antenna and the satellite circular-polarization antenna.

Description

technical field [0001] The invention relates to the field of communications, in particular to the field of dual-frequency antennas for satellite communication handheld terminals and trunking communication terminals. Background technique [0002] Satellite telephones have a wide coverage and are not subject to geographical restrictions, and are widely used in navigation, forestry, rescue and other fields. But at the same time, satellite communication has the problems of low capacity and poor coverage penetration (it can only be used in open areas, and cannot be covered indoors). Cluster phone has large capacity, strong penetrating ability, and small coverage area. The combination of satellite phone and cluster phone is exactly complementary. [0003] The satellite communication antenna is circularly polarized and has a higher frequency, while the cluster communication antenna is linearly polarized and has a lower frequency. Due to the limited size of the terminal, two anten...

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Problems solved by technology

[0005] In view of this, the present invention provides a circularly polarized and linearly polarized dual-frequency antenna and its terminal, without changing the circularly polarized volume of the satellite antenna, adding linearly polarized signals, circularly polarized antennas and linearly polarized radiation Multiplexing of oscillators solves the coexistence problem of cluster linear polarization antennas and satellite circular polarization antennas

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