No abstract

In this work, a novel symmetric periodic leaky‐wave antenna is proposed for open stopband suppression. The unit cell of the proposed antenna consists of an H‐shaped ring as the leakage element. Using L–C circuit analysis, it is shown that the open stopband is effectively eliminated by optimizing the H‐shaped ring. A prototype is fabricated to verify the simulated results. The antenna radiates in the broadside direction at 7.9 GHz. The impedance bandwidth corresponding to the n = −1 space harmonic ranges between 5.7 and 11 GHz.

No abstract

Conventional slotted waveguide antennas are well known and prominently used for many military and even marketable applications. This is due to their different advantageous electrical and mechanical characteristics. It is also well known that this type of antennas is a typical array of slots with which the width of the main beam can be controlled in only one plane by using a different number of elements in such antennas. Numerous research, discuss the capability of using an array of such antennas in order to narrow down the main beam in both planes and even achieve a scanning phased array. In this paper, a new and broader approach is presented concerning beam width control of the typical configuration of such antennas. This work presents the ability to control the main lobe in both planes using only one slotted waveguide to a certain extent. Different simulation results are considered at the 2.4 GHz frequency demonstrating improved effectiveness in terms of directivity and high gain as well as minimizing the side-lobe level and mechanically controlling the main lobe of the antenna.

No abstract