Cavity backed dual slot antenna for gain improvement

Abstract

A dual-frequency printed dipole loaded with two split rectangle ring resonators is presented in this article. The working frequencies are in the vicinity of the dipole and resonates frequencies. The radiation characteristics of the presented antenna are studied both theoretically and experimentally. It is a good candidate for the dipole with the requirement of dual frequency. ACKNOWLEDGMENTSThe authors thank the National Natural Science Fund of PR China for financial support (No. 60801042). They are also especially grateful to Anechoic Chamber of National Laboratory of Antennas and Microwave Technology of China for providing measuring facilities. ABSTRACT: A simple method of gain improvement for the cavity backed slot antenna based on the substrate integrated waveguide technique has been presented in this article. By using dual slot at the cavity edges to substitute a single slot at the cavity center as the radiating element, gain of the cavity backed slot antenna has been improved about 1.7 dB whereas its total size is little reduced. The proposed antenna has high radiation performance and keeps the advantages low profile, easy integration, and low cost fabrication.

A triple‐slotted substrate integrated cavity‐fed 2 × 2 metasurface antenna with wide bandwidth

“…The performances of the proposed design and the state‐of‐art designs are summarized in Table . Comparing with the reported SIC‐backed slot antennas or dual‐slotted SIC‐fed patch antenna, the proposed antenna shows wider bandwidth with enhanced gain. Comparing with the reported metasurface antennas, the proposed antenna exhibits enhanced bandwidth with three modes and flat gain.…”

“…Cavity‐backed slot antennas have been extensively studied because they are suitable for high frequency operation with low cost and easy integration. Most of the reported cavity‐backed slot antennas are using the substrate integrated waveguide cavity with one or two radiating slots, and the bandwidth of these antennas is usually narrow.…”

Design of a cavity-based filtering antenna with dual-polarization operating at Ka -band

“…, while the one in Figure B is extended from its dual‐slot counterpart published in Ref. . Both kinds of radiators are capable to work in two orthogonal modes and generate two orthogonal linear polarizations.…”

Review of Low Profile Substrate Integrated Waveguide Cavity Backed Antennas

“…Single gain improved antenna element and antenna array designs are the most common methods to meet this International Journal of Antennas and Propagation 5 requirement. A gain enhanced SIW cavity backed dual slot antenna was presented in [35]. The two parallel slots close to the cavity edges and perpendicular to the GCPW feeding line were used as radiating elements.…”