Low-consumption low-minor lobe high-gain planar frequency scan antenna

Abstract

The invention discloses a low-consumption low-minor lobe high-gain planar frequency scan antenna, which comprises three layers of planar dielectric substrates that are overlapped, wherein gaps are formed among the three layers of planar dielectric substrates; the three layers of planar dielectric substrates are fixed by plastic screws; the first layer of planar dielectric substrate comprises an antenna radiating element and a floor; the upper surface and the lower surface of the second layer of planar dielectric substrate are symmetrically arranged; the second layer of planar dielectric substrate comprises a slow-wave serpentine curve structure, a power divider, a transmission line feed structure and a matched load; the terminal of the slow-wave serpentine curve structure is connected to the matched load; the slow-wave serpentine curve structure is connected with the power divider; the transmission line feed structure is connected with the power divider; and the third layer of planar dielectric substrate is a floor. The antenna is low in consumption, and minor lobe, high in gain, simple in structure and convenient to implement.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a plane frequency scanning antenna with low consumption, low side lobe and high gain. Background technique [0002] With the continuous development of modern radar technology, the requirements for antenna tracking speed are increasing day by day. The electronic scanning antenna has basically replaced the mechanical scanning antenna because of its extremely low wave velocity scanning time, small signal attenuation, and good operating performance. The principle of using frequency scanning to realize beam scanning is simple, the structure of the feeding network is simple, and the cost is relatively low. The traditional frequency scanning antenna consists of a serpentine slow-wave waveguide structure as a phase shifting unit and a waveguide slot antenna as a radiating unit. Due to the extremely low loss of the waveguide, frequency-sweeping antenna arrays of higher gain can be reali...

AI Technical Summary

Problems solved by technology

However, due to the requirements of planarized circuits, these leaky-wave antennas for frequency scanning have a common problem, that is, the loss

Due to the planar printing process, the introduction of dielectric loss makes the transmission loss of the planar leaky wave antenna much larger than that of the waveguide frequency-sweep antenna, which cannot achieve high-gain frequency-sweep array antennas, and often has large gain fluctuations in the frequency band.

In addition, since the traveling wave transmission structure and the radiation unit of this type of leaky wave antenna are integrated in the design, it is difficult to realize different distributions of the array, and it is difficult to meet the requirements of low sidelobes while performing beam scanning (see Document 2: Y. Dong and T. Itoh, “Composite right / left-handed substrate integrated waveguide and half mode substrate integrated waveguide leaky-wave structures,” IEEE Trans. Antenna. Propag., vol. 59, no. 3, pp 767-775, Mar. 2011)

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