Continuously tunable concurrent dual-frequency impedance matching network

Sharma, Vivek; Pathak, Nagendra Prasad

doi:10.1109/iciinfs.2012.6304777

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Nevertheless, this technology does not result in a low cost solution and its use in stub-based or transmission-line-based MEMS matching networks is impractical at the Cospas-Sarsat frequencies, as even miniaturisation by the use of slow-wave structures leads matching circuit footprints in the order of the wavelength. In other applications, the use of varicap diodes [22][23][24] has resulted in low cost and compact reconfigurable solutions. For tunable capacitors, a lookup table may be used to predict the optimal capacitor value [25].…”

Section: Iet Microwaves Antennas and Propagationmentioning

confidence: 99%

Wearable self‐tuning antenna for emergency rescue operations

Baroni

Nepa

Rogier

2016

IET Microwaves, Antennas & Propagation

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In this study, the design, hardware implementation and characterisation of a self-tuning 406 MHz antenna of a Cospas-Sarsat personal locator beacon are presented. The realised prototype is able to perform automatic tuning of the antenna under time-varying environmental conditions due to human body movements and sea water proximity. The impedance tuning is performed by tracking the instantaneous value of the reflection coefficient and by modifying an appropriate impedance matching network according to a real-time adaptive algorithm. A resilient default/backup software architecture has been designed to ensure that tuning guarantees a return loss higher than 10 dB for the personal locator beacon in most of impedance mismatching conditions.

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Section: Iet Microwaves Antennas and Propagationmentioning

confidence: 99%