A Power Divider Phase Shifter for Feeding Quadrifilar Helical Antenna

Abstract

The invention discloses a power dividing phaser for four-arm helical antenna feed. Through the small power dividing phaser, one input, four power equal divisions and output with phase sequentially differing by 90 degrees are achieved, the input port is located at the bottom of a module and is of a parallel double-line structure, meanwhile, feed is conducted on two symmetrical strip-shaped line coupling units, the input signal power is divided equally, and the phase difference is 180 degrees. Direct-through ports and coupling ports of the two strip-shaped line coupling units which are symmetrical in structure and divided equally in power are connected with four output port electrodes of the side face of an LTCC multilayer base plate through metal wires respectively. By means of the power dividing phaser, the area occupied by the circuit is reduced greatly for further reducing the occupied area and meeting the performance requirement, the integration level and reliability of the power dividing phaser are improved, the bandwidth is wide, the working band ranges from 1.0 GHz to 2.0 GHz, and the power dividing phaser can be suitable for a four-arm helical antenna at different frequencies.

Description

technical field [0001] The invention belongs to the technical field of antenna feeding, and relates to a power division phase shifter used for feeding a four-arm helical antenna. Background technique [0002] The satellite navigation system develops rapidly and is widely used in various fields such as navigation, communication, surveying and mapping, timing, and detection, and plays an important role in daily life and economic construction. The four-arm helical antenna has been widely used in the field of satellite communication because of its cardioid pattern, good front-to-back ratio, and excellent wide-angle circular polarization. The performance of the four-arm helical antenna T / R component directly affects the working quality of the entire navigation and communication equipment; among them, the four-arm helical antenna feed network is a key part of the antenna T / R component, and its performance affects the performance of the T / R component Therefore, how to improve the ...

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Problems solved by technology

[0005] In 2001, O.Leisten, J.C.Vardaxoglou and others published the article "Miniaturised electrically-loaded quadrifilar antenna for global positioning system (GPS)," (Electron.Lett., vol.37, no.22, Oct.2001, pp.1321- 1322) introduced a quadrifilar helical antenna feeding network obtained by the self-phase shifting method to obtain orthogonal feeding, which realized the miniaturization of the antenna; however, the antenna with this feeding structure has a circular pole It is difficult to precisely adjust the 90-degree phase difference of the input signals of the four helical arms, and the axial ratio bandwidth is narrow; the process requirements are high

This kind of feeding network occupies a relatively large space, which is not conducive to the miniaturization of the T / R component of the quadrifilar helical antenna; and three Wilkinson power dividers are used to realize the power division and phase shifting functions, which leads to the overall feeding Complex structure and high loss

[0007] In addition, some feed network structures have been reported. The size of these feed networks is generally large, which is not conducive to the miniaturization of antenna transceiver components.

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