By Balamati Choudhury, Bhavani Danana, Rakesh Mohan Jha
This ebook specializes in high-gain antennas within the terahertz spectrum and their optimization. The terahertz spectrum is an unallocated EM spectrum, that's being explored for a couple of purposes, in particular to satisfy expanding calls for of excessive information charges for instant area communications. house communique structures utilizing the terahertz spectrum can unravel the issues of restricted bandwidth of current instant communications with no radio-frequency interference. This ebook describes layout of such high-gain antennas and their functionality enhancement utilizing photonic band hole (PBG) substrates. extra, optimization of antenna types utilizing evolutionary set of rules dependent computational engine has been integrated. The optimized high-performance compact antenna can be used for numerous instant purposes, resembling inter-orbital communications and on-vehicle satellite tv for pc communications.
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Extra resources for PBG based Terahertz Antenna for Aerospace Applications
Brener, J. Lopata, J. Wynn, L. Pfeiffer, and J. Federici. 1997. Design and performance of singular electric ﬁeld terahertz photoconducting antennas. Applied Physics Letters 71(15): 2076–2078. , M. Kroug, H. Merkel, P. Khosropanah, A. Adam, E. Kollberg, D. Loudkov, G. Gol’tsman, B. Voronov, H. W. Huebers. 2002. 6 THz heterodyne receiver for the far infrared space telescope Physica C: Superconductivity 372–376: 427–431. , L. Kuzmin, M. Tarasov, P. Sundquist, M. Willander, and T. Claeson. 1998. Normal metal hot-electron microbolometer with Andreev mirrors for THz space applications.
Babanrao et al. 30 dB, and a radiation efﬁciency of 99 % could be achieved using this design. 36 % improvement in radiation efﬁciency over a microstrip patch antenna without DGS. However, the design had not shown any improvement in directivity. Multilayer Substrate In this type of antennas, the patch is etched on multilayer dielectric substrates where each layer of substrate is made of different material and of different thickness. Appropriate selection of material and thickness of substrate layers may result in reduction of surface wave loss thus improving the performance of antenna.
Stern, B. G. LeDuc. 2003. 25 THz of the Herschel space radio telescope. In 14th International Symposium on Space Terahertz Technology, 1 pp. , J. Kaur, and R. Singh. 2013. Performance analysis of different feeding technique. International Journal of Emerging Technology and Advanced Engineering 3(3). , and Yi Huang. 2006. Comparison of terahertz antennas. In Proceedings of First European Conference on Antennas and Propagation, pp. 1–5, Nov 2006. B. J. Dengler, T. H. Siegel. 2010. Confocal ellipsoidal reflector system for a mechanically scanned active terahertz imager.