Tuning Method for a New Electrically Small Antenna With Low Q

Tuning Method for a New Electrically Small Antenna With Low Q

We theoretically describe and experimentally demonstrate a new class of electrically small spherical antennas with near-minimum radiation Q . The antenna operates by supporting the TM 10 spherical mode and minimizing excitation of higher order modes. The antenna compares favorably to existing electr...

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Veröffentlicht in:IEEE antennas and wireless propagation letters 2009, Vol.8, p.303-306
Hauptverfasser: Adams, J.J., Bernhard, J.T.
Format: Artikel
Sprache:eng
Schlagworte:
Antenna measurements
Antenna theory
Antennas
Bandwidth
Current distribution
Dipole antennas
Electric variables measurement
electrically small antenna
Excitation
Frequency
helical antenna
Helical antennas
Jacobian matrices
Networks
Q
Q factor
Size measurement
spherical antenna
Spherical antennas
Tuning
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Beschreibung
Zusammenfassung:We theoretically describe and experimentally demonstrate a new class of electrically small spherical antennas with near-minimum radiation Q . The antenna operates by supporting the TM 10 spherical mode and minimizing excitation of higher order modes. The antenna compares favorably to existing electrically small antennas and can be easily designed for any frequency or with any electrical size. The antenna can be matched without an external network using methods described in this work. Measurements of two antennas of different electrical sizes are presented to demonstrate the tunability of the structure.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2009.2015437