Compact type conformal PIFA array antenna on UHF frequency band

Abstract

The invention discloses a compact type conformal PIFA array antenna working on a UHF frequency band. The compact type conformal PIFA array antenna working on the UHF frequency band is characterized by comprising a plurality of small-scale inverted-F-shaped antenna units, a horizontal antenna array which is composed of the inverted-F-shaped antenna units, a feed network and working frequency adjusting branches, the compact type conformal PIFA array antenna is printed on a flexible dielectric slab, and finally the flexible dielectric slab is bent and is arranged on the outer side face of a dielectric cylinder in a conformal mode to form a conformal radiator so as to achieve omnidirectional radiation. Repeated 90-degree bending operation of the inverted-F-shaped antenna units is adopted by the compact type conformal PIFA array antenna to achieve a low profile of the compact type conformal PIFA array antenna working on the UHF frequency band, and the overall height of the compact type conformal PIFA array antenna working on the UHF frequency band is about 0.06 lambda, wherein the lambda represents the air wave length. Due to the fact that the compact type conformal PIFA array antenna is arranged on the outer side face of the dielectric cylinder in a conformal mode, the sectional area of the compact type conformal PIFA array antenna can be reduced, and the compact type conformal PIFA array antenna can be installed in a narrow space. Due to the fact that the advantages that the inverted-F-shaped antenna units are convenient to manufacture, high in accuracy and low in cost are made full use of by the compact type conformal PIFA array antenna, miniaturization and the low profile of the compact type conformal PIFA array antenna working on the UHF frequency band are achieved, and high gain and the good omnidirectional radiation characteristic are achieved.

Description

Technical field [0001] The invention relates to a PIFA array antenna, in particular to a compact conformal PIFA array antenna in the UHF frequency band. Background technique [0002] Antennas are an indispensable part of the wireless system. With the continuous advancement of science and technology, wireless communication technology has developed rapidly. On aircraft, satellites, missiles and other carriers, the number and types of communication equipment have reached unprecedented levels. The requirements for antennas are becoming higher and higher. The requirements for developing low-profile miniaturized antennas and antennas that can conform to high-speed moving carriers are becoming higher. In recent decades, as an important frequency band for mobile communications, the topic of miniaturization of UHF frequency band antennas has attracted more and more researchers' attention. [0003] Due to the characteristics of omnidirectional radiation, simple structure and low cost, monop...

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Problems solved by technology

[0003] Due to the characteristics of omnidirectional radiation, simple structure and low cost, monopole antennas have been widely used in the field of modern communications, such as metal oscillator monopole antennas in vehicle communications, microstrip monopole antennas in wireless local area networks, etc. , but when working in the UHF frequency band, the engineering application of monopole antennas is limited due to limitations such as large physical lengths, so it faces urgent problems such as miniaturization, conformalization, low loss, and low cost.

However, when the size of the antenna is smaller than λ / 8 (λ is the wavelength of air), the performance of the antenna will deteriorate sharply, so how to achieve a low-profile, broadband, and high-gain antenna has become one of the research hotspots

[0004] In the prior art, there is no antenna that achieves low profile, high gain and conformal shape to the carrier at the same time

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