Abstract
In this chapter a thorough investigation into the development of frequency agile antennas for a software-defined and cognitive radio has been presented. In particular, attention has been focused on a number of practical issues concerning the design and modelling of electrically small antennas, as well as their tunable matching networks and concomitant control circuitry and algorithms. A new theoretical tool was presented for characterizing antennas from a system point of view, allowing their frequency selectivity to be incorporated into the RF front-end design. Tunable matching networks were also presented as well as appropriate analog and mixed-signal control circuitry to allow frequency-agile antennas to be reconfigured on demand by the radio's baseband processor. Finally, the implementation of an AATU prototype was discussed.
| Original language | English (US) |
|---|---|
| Title of host publication | Printed Antennas for Wireless Communications |
| Publisher | Wiley |
| Pages | 379-405 |
| Number of pages | 27 |
| ISBN (Electronic) | 9780470512241 |
| ISBN (Print) | 9780470510698 |
| DOIs | |
| State | Published - Nov 5 2007 |
Keywords
- Antenna control unit
- Automatic antenna tuning unit
- Closed-loop automatic antenna tuning unit
- Impedance synthesizer
- Matchable impedance domain
- Multiband and multimode radios
- Open-loop and closed-loop algorithms
- Software-defined radio
- Tunable matching network
- Two-port antenna model
ASJC Scopus subject areas
- General Engineering