Ultra wide band vertical polarization end-fire phased array capable of being integrally buried into cavity

Abstract

The invention discloses an ultra wide band vertical polarization end-fire phased array capable of being integrally buried into a cavity. The array is composed of four low profile log periodic monopoleantennae and can be integrally buried into the cavity, and minus or plus 45-degree scanning of an azimuth plane with an end-fire direction as beam pointing is realized. Relative bandwidth of the array is more than 100%, and profile height is about 0.051lambdaL (lambdaL is low frequency wavelength in a working band). A feed part of an array unit is composed of an SMA joint, a microstrip line-slotline structure and a coplanar metal strip line; a radiation part of the array unit is composed of 13 monopole antennae, each monopole antenna is designed into a copper rod, and a copper-coated mediumsubstrate structure with the thickness of 0.51mm is loaded at the top of each monopole antenna; the feed part of the array is formed by etching and laminating one copper-coated F4BM medium substrate with the thickness of 3.18mm and four copper-coated RF-10 medium substrates with the thickness of 0.635mm; and two 51 ohm chip resistors in 0805 package dimension are arranged at the tail end of the coplanar metal strip line.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering, and relates to an ultra-broadband vertically polarized end-fired phased array that can be integrally buried, specifically a logarithmic periodic monopole antenna that can be integrally embedded The metal cavity can be used in the field of radar detection and wireless communication, and can realize the vertically polarized antenna array with the beam pointing to the azimuth plane of the end-fire direction ±45° scanning. Background technique [0002] With the continuous development of modern military technology, air strikes and even space strike forces have gradually become the dominant force in modern military warfare. Vertically polarized low-profile, ultra-wideband phased scan arrays have always been a difficult point in the design of array antennas. For the array antenna applied to the airborne platform, first, it is required to have a wide beam coverage and a small antenna scannin...

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Problems solved by technology

[0004] However, for the application of phase-scanning arrays, the above four antennas proposed in published literature have two major drawbacks: one is that the array does not have scanning characteristics

Although the above-mentioned four types of antennas all have low-profile characteristics, when the arrays are designed to work in lower frequency bands, such as L-band (1GHz-2GHz) and S-band (2GHz-4GHz), the physical heights of the elements of these arrays are still several centimeter

At this time, if the array is directly installed on a mobile platform that requires high maneuverability, it will inevitably increase wind resistance and affect mechanical properties

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