UHF Electrically Small Box Cage Loop Antenna With an Embedded Non-Foster Load
- Resource Type
- Periodical
- Authors
- Church, J.; Chieh, J.-C. S.; Xu, L.; Rockway, J. D.; Arceo, D.
- Source
- IEEE Antennas and Wireless Propagation Letters Antennas Wirel. Propag. Lett. Antennas and Wireless Propagation Letters, IEEE. 13:1329-1332 2014
- Subject
- Fields, Waves and Electromagnetics
Loaded antennas
Bandwidth
Impedance
Loading
Capacitors
Electrically small antennas (ESAs)
loop antenna
negative impedance converter (NIC)
non-Foster
- Language
- ISSN
- 1536-1225
1548-5757
Traditional impedance-matching methods typically employ matching networks at the antenna input terminals. Alternatively, the antenna may be embedded with a non-Foster load to enhance the radiation bandwidth. This method is demonstrated here with the design of an electrically small box cage loop antenna $(ka\sim 0.37)$. Simulated results using ideal non-Foster components are compared against a negative impedance converter (NIC) circuit realization. These results show that the VSWR bandwidth is improved 8$\times$ by using the NIC circuit. Simulated radiation efficiencies are also presented for the first time.