Directive Stacked Patch Antenna for UWB Applications. Abstract: Directional ultrawideband (UWB) antennas are popular in wireless signal- tracking and body- area networks.
This paper presents a stacked microstrip antenna with an ultrawide impedance bandwidth of 1. The optimized reflection response and the radiation pattern are experimentally verified. The designed UWB antenna is used to maximize the received power of a software- defined radio (SDR) platform. For an ultrawideband impulse radio system, this class of antennas is essential to improve the performance of the communication channels. Introduction In impulse communication system, very short electromagnetic pulses are used to transfer information and require UWB antennas to maintain similar radiation characteristics for a wide frequency spectrum . In the literature, majority of the printed UWB antennas are designed to exhibit omnidirectional radiation characteristics . However, wireless body- area network requires directional UWB antennas to minimize the interaction with human body . Steerable and directional UWB arrays are also used in wireless signal tracking and MIMO networks to determine the angle of the received multipath signal for nulling interfering signals . Although compact and low- profile microstrip antenna and arrays are best suited for the directional impulse communication, their inherently narrow- bandwidth often introduces transmission error. Standard techniques for improving the impedance bandwidth of a microstrip antenna includes electrically thick substrates . 10 db impedance bandwidth of rectangular microstrip patch antenna is at 2.2 GHz. There are various techniques for feeding the antenna such as microstrip line feed, coaxial probed feed. Uwb Patch Antenna Desighn The proposed rectangular microstrip patch antenna. Compact directive UWB antennas are presented in this paper. We propose an optimization of the F-probe fed triangular patch antenna. The new design achieves an impedance bandwidth of 6 9 % (3–6.15 GHz) and presents good. A patch antenna (also known as a rectangular microstrip antenna). In this antenna, one corner of the patch (or sometimes one edge) is grounded with a ground pin. This variant has better matching than the standard patch. Other methods use defected ground structures (DGS), where inherent resonant frequencies can be controlled by changing the shape and the dimension of the defects or slots . These additional resonances, when optimally excited, can considerably increase the impedance bandwidth of a microstrip antenna. Uwb Directive Triangular Patch Antenna HfssIn the literature, radiating patches with “U” or “L” shaped slots are popular for improving the bandwidth without increasing dimension of the antenna . Similarly, C- shaped slots on the ground plane can influence the impedance bandwidth by disturbing the shielding currents . However, this technique reduces the antenna directivity through back radiation.
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