Fabry-Pérot cavity antenna with lateral metallic walls for WiBro base station applications

Abstract

A new Fabry-Pérot cavity antenna simultaneously producing a highgain and a wide beamwidth is proposed. To get increased antenna gain and reduced back radiation, all the openings of the antenna are enclosed with metallic walls, and to obtain a broader beamwidth, the antenna has been fabricated in a rectangular shape, with an aspect ratio of about 3.5:1. In addition we propose a new method to more accurately predict the frequency of the maximum gain by considering a resonance mode of the cavity enclosed by metallic walls. Good agreement between the prediction and measurement results ensures the validity of the new design approach to provide easy control of gain and beamwidth at the same time.

A non-uniform design of the metamaterial superstrate for the resonant cavity antenna with wideband property

“…To simplify the design work, unit cells are symmetry with respect to the superstrate's center, each of them occupies a same-size area, which is as the same as that in the uniform superstrate, and their side-length varies according to an exponent function as (1). (1) where, L is the side-length for a unit cell; L0 denotes the sidelength of the central unit cell on the superstrate; D is the index of each unit as show in Fig. 3; k and j are two parameters need to be determined.…”

“…The performance of high-gain, high efficiency, and low-complexity feeding network compared to conventional microstrip patch arrays characterize this type of antenna [1][2][3], which would find numerous applications in modern communications, radar, sensor systems and Microwave Power Transmission.…”

Single- and dual-band leaky wave antennas using an electromagnetic band gap structure

“…[12,13] Assuming that k(= β − jα) and k 0 are propagation constants in a periodic structure and free space, then radiation occurs under the condition of |β| ≤ k 0 , which belongs to a fast wave regime. Accordingly, a resulting radiation beam depending on β radiates toward θ , which can be determined by…”

“…Regarding antenna geometry and gain, we can find similar approaches of electromagnetic band gap (EBG) antennas [6][7][8] and Fabry-Perot cavity (FPC) antennas with partially reflective surfaces, [9][10][11][12] which presents high gain with a minimum number of feeders. Although, the two techniques are advantageous in that a feed structure is simple and gain is very high, they still need an appropriate height greater than λ/4 in order to obtain intended resonance, which is a very sensitive factor for high-gain operation.…”

A metallic Febry-Perot cavity antenna with slot-type FSS and hybrid lateral boundaries for high aperture efficiency

“…Compared to traditional antenna arrays to achieve high directivity, FPCA can have the same performance but with no complex feeding network. A variety of novel FPCA has been proposed with different structures and capabilities in the past two decades [2][3][4][5][6][7][8].…”