Conical four-arm sinuous antenna and polarization control method of antenna

Abstract

The invention discloses a conical four-arm sinuous antenna, which comprises a first dielectric substrate, a second dielectric substrate and a third dielectric substrate, wherein the first dielectric substrate is a hollow truncated cone, the second dielectric substrate is arranged at the top end of the first dielectric substrate; a first group of sinuous metallic arms are arranged on the outer surface of the first dielectric substrate, and a second group of sinuous metallic arms are arranged on the inner surface of the first dielectric substrate; a first group of metallic connecting bands are arranged on the upper surface of the second dielectric substrate and a second group of metallic connecting bands are arranged on the lower surface of the second dielectric substrate; the third dielectric substrate is provided with a first group of micro-strip index gradient baluns and a second group of micro-strip index gradient baluns, wherein the first group of micro-strip index gradient baluns and the second group of micro-strip index gradient baluns are connected with the corresponding signal sources respectively; the first group of sinuous metallic arms and the first group of micro-strip index gradient baluns are electrically connected with each other through the first group of metallic connecting bands and a first group of radiating elements are formed; the second group of sinuous metallic arms and the second group of micro-strip index gradient baluns are electrically connected with each other through the second group of metallic connecting bands and a second group of radiating elements are formed.

Description

technical field [0001] The invention relates to a broadband fully polarized directional antenna, in particular to a conical four-arm sinusoidal antenna. Background technique [0002] As an important part of transmitting and receiving electromagnetic waves, antennas are an important part of radio equipment and systems. Many modern wireless systems such as communication and radar systems require antennas to work effectively in a wide frequency range. The main electrical parameters of the antenna, such as impedance, gain, pattern, axial ratio, etc., have their respective bandwidth limitations. The bandwidth of the antenna should be defined by the narrowest bandwidth, that is, the main performance indicators of the antenna within this bandwidth can reach Specifies the requirements. [0003] The scaling principle of the antenna states that if the model size of the antenna changes in the same proportion as the operating frequency (or wavelength), the performance of the antenna re...

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Problems solved by technology

[0006] The traditional sinusoidal antenna is a planar structure with a two-way radiation pattern. In order to achieve one-way radiation, it is usually necessary to place a metal back cavity filled with absorbing materials behind the radiator [3] , but this method will lose part of the radiated energy and reduce the antenna gain

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