Low cost beam‐steering leaky‐wave antenna for microwave application

Abstract

Leaky‐wave antennas (LWAs) provide interesting features such as high gain beams which are scannable with frequency, radiating through broadside and ease in fabrication, suggesting them as a favorable solution for communication systems at upper microwave frequencies. In this article, a novel LWA has realized in substrate integrated waveguide (SIW) technology with excellent broadside radiation at 15.82 GHz that proposed a closed and linear dispersion around broadside utilizing two‐radiation mechanism. In addition, the circuit model for the unit cell of LWA has presented around the broadside frequency that confirms our method of closing the stopband. Measured and simulation results are in good agreement that confirms this approach.

Substrate integrated waveguide leaky wave antenna with circular polarization and improvement of the scan angle

“…Leakey wave antennas (LWA) are realizably creating various uniform or periodic slot shapes on the transmission lines, such as a typical waveguide or substrate-integrated waveguide. [1][2][3][4][5][6][7][8] In this type of antenna, in a particular frequency band, a leaky wave is formed vertically to the antenna surface. The most important feature of the leaky wave antennas is that the antenna beam angle changes with the frequency variation, which is very useful in navigation systems.…”

A continual backward‐to‐forward beam scanning periodic microstrip leaky‐wave antenna with highly stable gain

“…In addition, it is important for the P‐LWA to maintain stable gain in the operational frequency band, but this question is often overlooked. In recent years, most of the proposed continual backward‐to‐forward beam scanning P‐LWAs cannot achieve stable gain in the operational bandwidth 11–20 …”