AffiliationMicrowave Subsystems, Inc.
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RightsCopyright © held by the author; distribution rights International Foundation for Telemetering
Collection InformationProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.
AbstractThis paper addresses the system requirements of the C-Band TM antenna that will take the place of the S-Band TM antenna used in applications on munitions and targets that require a quasi-omni directional antenna pattern. For these applications, the C-Band TM effective radiated power (ERP) must be approximately 3 dB higher than the S-Band TM ERP to achieve the same system performance due mainly to weather and environmental differences. From a systems stand-point, this will be a problem for the following reasons: power amplification at higher frequencies is usually less efficient, there is a limit on prime power due to battery capabilities, and a more complex corporate feed at C-Band as compared to S-Band will produce more loss. This means that a more fruitful approach would be to use smart antenna ideas to achieve the required higher ERP as compared to current approaches of using higher power transistors and more battery power. Several smart antenna ideas are introduced in this paper, switchable driven element antenna is described including active amplification at each element.
SponsorsInternational Foundation for Telemetering
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DESIGN AND APPLICATION OF ANTENNA COUPLERS FOR CERTIFICATION OF AIRBORNE INSTRUMENTATION ANTENNASKujiraoka, Scott R.; Davis, Rick; Naval Air Warfare Center Weapons Division (International Foundation for Telemetering, 1999-10)Instrumentation antennas installed on missiles and airborne targets are required to be tested and certified prior to flight. The antenna coupler is a means of certifying that the antenna is in proper working condition prior to deployment, as damage to the antennas may have occurred during transportation or installation. This coupler also provides a low cost means to evaluate and monitor the antenna throughout the various stages of design and assembly. These antennas can contain arrays for telemetry, beacon tracking, global positioning systems and flight termination. A failure by any one of these arrays could result in the loss of data or improper operation of the flight vehicle. Description of the design and function of antenna couplers will be discussed.
A Novel Antenna Design for Size Constrained Applications Requiring a Thin Conformal AntennaCirineo, Anthony; David, Rick; Naval Air Warfare Center (International Foundation for Telemetering, 2010-10)This paper will discuss the design of a new antenna element for use on vehicles requiring a thin conformal antenna such as on missiles or targets. The new element employs a partial shorted edge, which reduces the size of the element compared to a traditional microwave patch, while maintaining the impedance bandwidth.
Contribution assessment of antenna structure and in-gap photocurrent in terahertz radiation of photoconductive antennaZhang, Jitao; Tuo, Mingguang; Liang, Min; Wang, Xiong; Xin, Hao; Univ Arizona, Dept Elect & Comp Engn (AMER INST PHYSICS, 2018-08-07)Photoconductive antenna (PCA) is one of the most widely used terahertz (THz) devices nowadays. Although PCAs have been extensively studied through both theoretical analysis and device design, there still lacks a common agreement upon the mechanism of THz radiation. One of the central questions is how to distinguish and assess the contribution of the antenna structure and in-gap photocurrent to the overall radiation of a PCA. In this work, a three-dimensional full-wave model was first used to quantify the overall far-field radiation of PCAs. The commercial solver (i.e., HFSS) and the Hertzian dipole approximation method were then applied to quantify the far-field radiation solely from the antenna structure and in-gap photocurrent, respectively. The contribution of the antenna structure and in-gap photocurrent can therefore be distinguished by comparing the simulation results among the three methods. The results suggest that, although the THz radiation originates from laser-excited photocurrent within the gap, the overall THz radiation of a PCA is predominated by the antenna structure. As a validation, the cancellation effect was predicated by numerical simulation of coplanar stripline PCA and confirmed with experiment using butterfly shaped stripline PCA. The presented work uncovers the details of the underlying radiation mechanism of the PCA. This could inspire PCA design that aims for engineering the radiation properties of a PCA for specific applications. Published by AIP Publishing.