Automatic antenna tuning method and apparatus

H - Electricity – 01 – Q

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

351/46

H01Q 7/00 (2006.01) H01Q 1/27 (2006.01) H03J 1/00 (2006.01) H03J 7/28 (2006.01)

Patent

CA 2004542

A wristwatch paging receiver is provided with an antenna matching network that automatically retunes the network at the beginning of a listening interval. During the retuning operation, a control signal is applied to a variable tuning element in the matching network, such as a varactor diode, and is swept from a minimum value to a maximum value. This sweeping is desirably performed in discrete voltage steps that correspond to unit increments of varactor capacitance. A feedback signal from the receiver, such as an AGC signal, is monitored during this operation to note which varactor bias signal yields the maximum AGC signal. After the sweep is concluded, the apparatus applies to the varactor the bias voltage that yielded the maximum AGC signal during the sweeping operation. This bias voltage is maintained through the end of the listening interval. At the beginning of the next listening interval, the process may be repeated.

L'invention est un récepteur de téléavertissement monté sur un bracelet qui est doté d'un réseau d'adaptation d'antenne qui resyntonise automatiquement le réseau au début d'un intervalle d'écoute. Durant l'opération de resyntonisation, un signal de commande est appliqué à un élément de syntonalisation variable du réseau d'adaptation, tel qu'une diode varactor, et est soumis à un balayage allant d'une valeur minimale à une valeur maximale. Ce balayage est effectué par une variation de tensions discrètes qui correspondent aux incréments unité de la capacité du varactor. Un signal de rétroaction provenant du récepteur, tel qu'un signal de commande de gain automatique, est surveillé durant cette opération pour détecter le signal de polarisation du varactor qui produit le signal de commande de gain d'intensité maximale. € la fin du balayage, le dispositif applique au varactor la tension de polarisation qui a produit le signal de commande de gain automatique d'intensité maximale durant le balayage. Cette tension de polarisation est maintenue jusqu'à la fin de l'intervalle d'écoute. Le processus est répété au début de l'intervalle d'écoute suivant.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Automatic antenna tuning method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic antenna tuning method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic antenna tuning method and apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1468822

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.