论文信息 - A small wideband multimode antenna

A small wideband multimode antenna

This paper presents a multi-resonant spherical antenna with a normalized size ka~0.54 and excellent bandwidth performance (k is the wavenumber and a is the radius of the sphere circumscribing the maximum dimension of the antenna). The spherical geometry is chosen in order to establish a baseline Q-factor against which to compare the bandwidth: a Q at 1.5x the lower bound is known to be achievable for optimized small, single resonance spherical antenna designs. The antenna presented here is designed to support two natural resonances, one low-Q and one high-Q . It postulates that the high-Q mode acts in a manner analogous to a higher-order matching circuit.

H.R. Stuart | S.R. Best

[1] S. Best,et al. Impedance, bandwidth, and Q of antennas , 2005 .

[2] F. Schwering,et al. Diakoptic theory for multielement antennas , 1979 .

[3] S.. A Re-Examination of the Fundamental Limits on the Radiation Q of Electrically Small Antennas , 2008 .

[4] L. J. Chu. Physical Limitations of Omni‐Directional Antennas , 1948 .

[5] Robert C. Hansen,et al. Electrically Small, Superdirective, and Superconducting Antennas , 2006 .

[6] R. Hansen. Electrically Small, Superdirective, and Superconducting Antennas: Hansen/Electrically Small, Superdirective, and Superconducting Antennas , 2006 .

[7] S.R. Best,et al. Limitations in Relating Quality Factor to Bandwidth in a Double Resonance Small Antenna , 2007, IEEE Antennas and Wireless Propagation Letters.

[8] A.R. Lopez,et al. Review of narrowband impedance-matching limitations , 2004, IEEE Antennas and Propagation Magazine.