Ultrawideband doubly tapered slot antenna (DTSA) with integrated balun as a feed for time‐domain target detection

Abstract

This article discusses the design of an ultrawideband doubly tapered slot antenna (DTSA) using an ultrawideband balun at its input feeding network. The proposed antenna with integrated balun is completely planar in nature with a conventional microstrip feed. The complete antenna structure with integrated balun realized on an 8 mil Rogers's RO4003C substrate shows a measured return loss of better than 10 dB from 4 to 36 GHz and measured peak gain of 2.08–8.44 dB for the entire band. The time domain characteristics of the transmitting/receiving system using the proposed ultrawideband (DTSA) antenna is also investigated giving a low variation in group delay (≤0.18 nsec). This transmitting/receiving system with the proposed antenna is further used to demonstrate possibility of using this antenna for target detection.

4-40 GHz In-Phase/ 180° Out-of-Phase Power Dividers with Enhanced Isolation

“…On the other hand, a 180° out-ofphase power divider, also referred to as balun power divider, divides the input signal into two output signals that are, ideally, equal in magnitude and 180° out-of-phase. Both types of power dividers are greatly useful in many applications and systems, such as balanced antennas [1], antenna arrays' feeding and beam-forming networks [2], and the newly rising In-Band Full-Duplex (IBFD) technology [3]. Both types of power dividers are required by many systems that are sensitive to the imbalances between their different branches, thus, it is of great importance to have both types of power dividers with similar performance and behavior.…”