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Lockheed Martin Space Systems Company has pioneered advanced antenna solutions over several decades and built a wider range of payload solutions than any other company in the industry. This paper presents a few antenna technologies which has been successfully developed and flown over the years.
S-parameter measurements are used to obtain impedance mismatch and coupling loss of radiating elements embedded in an array configuration. This paper shows how the measurements can be used independently of element pattern measurements to estimate the array element efficiency. The method is extended to the array antenna efficiency by synthesizing the active S-parameter coefficients assuming uniform...
Robust, inexpensive, non-conductive material that can survive launch and reentry environments is needed to support the Orion antenna suite. The boost protective cover (BPC) is not optimal for RF performance, but reasonable criteria for utilizing BPC as a material are established to perform expeditious flight qualification. This paper outlines the results of this investigation. Although BPC has a moderate...
Ultra-wideband dual-polarized arrays are commonly used in polarimetry applications. However, poor orthogonality between the two desired polarizations is observed at wide scan angles. This paper investigates the behavior using a Vivaldi wideband array and compares its pattern characteristics to a narrowband patch antenna array. An elegant two-port approach is presented to compensate for this phenomenon...
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