A handheld terminal antenna for mobile satellite communication system

Abstract

The invention discloses a handheld terminal antenna for a mobile satellite communication system, which comprises a four-arm helical antenna, a circular polarization network component and an antenna shell. The four-arm helical antenna includes first to fourth helical arm patches and a medium cylinder, the first to fourth spiral arm patches are spirally printed on the outer wall of the medium cylinder, the medium cylinder is fixed on the circular polarization network component, and an antenna shell is arranged outside the medium cylinder; the circular polarization network component includes The first to the fourth microstrip patch and the LTCC circular polarization network, one end of the first to the fourth microstrip patch is respectively connected to the four output ports of the LTCC circular polarization network, the first to the fourth microstrip patch The other ends of the slices are respectively connected to the first to fourth spiral arm patches; the input port of the LTCC circular polarization network is a radio frequency connector, and the radio frequency connector is connected to the radio frequency circuit of the handset terminal.

Description

technical field [0001] The invention relates to an antenna applied to a mobile satellite communication system, in particular to a handheld terminal antenna used in a mobile satellite communication system. Background technique [0002] Satellite communication terminals usually have two frequency bands for sending and receiving, so the satellite communication handset antenna requires dual-band work. The ordinary quadrifilar helical antenna is a resonant antenna with a narrow bandwidth, so it is necessary to study broadband or dual-frequency quadrifilar helical antennas. [0003] Due to the limitation of the size of the handset, the antenna of the handset not only has requirements on the working frequency band and gain, but also has certain restrictions on its size. The s-band handheld antenna requires a diameter within 15mm and a height within 90mm. [0004] At present, there are mainly two types of quadrifilar helical antennas. One is to directly wind a metal wire into a he...

AI Technical Summary

Problems solved by technology

In this article, two antennas with similar structures working in different frequency bands are formed into a whole in an internal and external coaxial manner to achieve dual-frequency operation. The advantage is that both frequency bands have achieved better wide-beam circular polarization performance. The disadvantage is that The two antennas are wound with metal wires. In addition to the heavy weight, the volume is also difficult to meet the requirements for the handheld antenna.

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