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This paper presents a wideband circularly polarized antenna for small satellites to be used with NASA Near- Earth Networks (NEN). This single-fed stacked antenna utilizes the electromagnetic coupling concept and is usable with a duplex transceiver. The circularly-polarized antenna employs hybrid perturbations on stacked patches and covers NASA NEN’s both uplink and downlink frequencies, thus replacing the conventional requirement of two separate antennas. It provides a notable wide axial ratio (AR) < 3 dB bandwidth of 1.16 GHz from 7.02 GHz to 8.18 GHz (15.3%). The optimized patch dimensions provide 34.6% VSWR ~ 2 bandwidth from 6,525 MHz to 9,253 MHz. The overall antenna size is 17 mm × 17 mm × 6.6 mm, and has a peak gain of 7.9 dBi. This proposed antenna will overcome solar cell space constraint on smallsat’s outer wall by saving at least 50% area required by the conventional two-antenna method.
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This content will become publicly available on January 7, 2026
A Compact CPW-Fed Circularly Polarized Planar Monopole Antenna for IoT Applications
A flexible, compact C-shaped coplanar waveguide- fed (CPW-fed) circularly polarized (CP) antenna is proposed for Internet of Things (IoT) applications. The antenna is designed on a polyethylene terephthalate (PET) substrate, enabling flexibility and the potential for conformal integration. The design achieves a wide 3-dB axial ratio bandwidth (ARBW) of 5.66 GHz (79.94%) from 4.25 GHz to 9.91 GHz, demonstrating excellent CP perfor- mance. Additionally, the antenna exhibits a broad 10-dB return loss bandwidth (RLBW) of 7.67 GHz (99.55%) spanning 3.87 GHz to 11.54 GHz, fully encompassing the ARBW. The antenna maintains a peak gain over 3.5 dB and radiation efficiency over 95% within the ARBW. This wide operational range makes the antenna suitable for a variety of wireless communication systems, including WiFi, WiMAX, and emerging 5G technologies.
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- Award ID(s):
- 2104513
- PAR ID:
- 10639955
- Publisher / Repository:
- IEEE
- Date Published:
- Page Range / eLocation ID:
- 104 to 105
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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