Wideband Low-Sidelobe Slot Array Antenna With Compact Tapering Feeding Network for E-Band Wireless Communications

Abstract

In this work, a wideband low sidelobe slot array antenna for wireless communication system at E-band is presented. The slots are excited by a parallel feeding network where the Taylor distribution is applied. Two types of wideband unequal power divider with compact structures are designed for various output ratios to fit the limited feeding network space. One is integrated vertically inside a 2 × 1 elements subarray using a set of pins with asymmetrical offset. The other type is designed inside an E-plane T-junction with unbalance impedance at two output ports. To avoid main lobe tilt and asymmetrical radiation patterns, the feeding network is designed to be biaxially symmetrical, and the feed port is placed in the center of the back. A prototype is fabricated with brass and measured in an anechoic chamber. It achieves a peak gain of 25.8 dBi and a fractional impedance bandwidth of 19.2 % with S 11 below −10 dB. The measured radiation patterns agree with the simulated patterns very well, and the sidelobe level is lower than −21 dB.

Dual-Polarized Wideband Low-Sidelobe Slot Array Antenna for V-Band Wireless Communications

“…T-junction with a power-split ratio of type C (5.61 dB) is used to connect subarrays in both feeding networks. The structure of the E-plane subarray unequal power divider is similar to the one proposed in [16]. In this work, the two output branches are used as the feed of the H-plane unequal power dividers with the coupling aperture one instead of directly exciting the radiating slots.…”

“…On the other hand, a hollow waveguide with an E-plane feed network is an alternative way to minimize the power leakage at the millimeter wave. It was first introduced in [15] and has been proven effective at E-band [16].…”

“…It is only effective in the target plane SLL suppression, and the overall thickness of the prototype is increased. A low SLL antenna with multi-level compact unequal power dividers is introduced in [16]. Taylor synthesis is applied with each element as a tapering unit, which ensures a smooth SLL envelop of the radiation pattern.…”

Wideband Slot Array Antenna Fed by Open-Ended Rectangular Waveguide at W-Band

“…To implement the feeding network into one layer, it has to be as compact as possible. In order to reduce the cross-sectional area, structures with E-plane T-junctions are employed in [2], [23]. However, its two output branches are 180 • out of phase, which requires an extra bend structure to compensate.…”

A review of measurement of electromagnetic emission in electronic product: Techniques and challenges

“…Studies and Applications [44] Characterizing the reflection coefficient of RAM using time domain technique [45] Evaluation of AC using matrix pencil technique [46] Contributions of site for radiated emission measurement Uncertainties more than 1 GHz [47] Laptop emission [48] Effect of electrically large structures on the EMC compliance [49] Single probe anechoic chamber technique for MIMO OTA measurement [50] Radiation pattern measurement for modulated metasurface antenna [51] Radiation pattern measurement for wideband lowsidelobe short array antenna [52] Radiation pattern measurement for arbitrary phased array system [53] Testing the effectiveness of the shared tower scale model [54] Radiation pattern measurement for monopole antenna with the periodic patch director [55] Validation of connector emission measurement [56] Simulations of automotive EMC [57] Effect of table material on radiated immunity Test [58] Radiated emissions measurement from an automotive cluster…”