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Abstract: A circularly polarized (CP) antenna integrated with an artificial magnetic conductor (AMC) plane is presented. The AMC plane is aimed at enhancing the gain of the CP antenna, besides reduced back‐radiation, and avoiding radiation toward other high‐frequency components on the CubeSat. It consists of a 3 × 3 array of diamond‐shaped unit cells placed behind the complementary dipole‐based antenna. To enable deployability and compact deployment size, the AMC structure is designed on a thin flexible Kapton film as substrate, whereas its metallic components are formed using Nickel conductive paint. Meanwhile, the CP antenna is designed on a thin Rogers RO4003C substrate and located on top of the AMC plane at a 20 mm distance. The combined structure operates at 2.4 GHz with satisfactory reflection and radiation performance. It is sized at 99 mm × 99 mm × 21.485 mm3, with 450 MHz (18%) of 10 dB impedance bandwidth and 250 MHz (10%) of 3 dB axial ratio bandwidth. The AMC plane also improved its gain from 3.05 dBi up to 5.35 dBi. [ABSTRACT FROM AUTHOR]

A circularly-polarized conical-beam microstrip patch antenna, with a coplanar conductor pattern, is realized as an array of a number of stripline-fed slotted patches whose diagonal corners are cut off and whose feedlines meet at a central point. Prototypes of such an antenna array with four patches are studied and tested. The results show reasonable agreement between measured and theoretical results. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 78–81, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23956 [ABSTRACT FROM AUTHOR]