Static antenna tuning and antenna voltage measurement

A method for forming an improved antenna tuning apparatus for a transmitter/receiver of a recognition system transmitter/receiver circuit, said recognition system having an associated matching member which operates with a transponder to control a control mechanism of a device;

• the matching member and other non-matching members containing facilities each of which, when receiving energy transmitted from said transmitter/receiver antenna produces a respective unique recognition signal in said transponder;
• control of the device being possible only upon simultaneous occurrence of both operation of the control mechanism and production of a recognition signal by the matching member;
• wherein the method for forming the improved static antenna tuning apparatus comprises the steps of:
• forming an antenna voltage conversion circuitry for converting a voltage signal to a measurement signal representative of transmitter/receiver antenna operation, said voltage signal arising from said transmitter/receiver antenna transmitting or receiving a recognition signal;
• forming a comparator circuit for comparing said measurement signal to a predetermined optimal transmitter/receiver antenna operation signal;
• and
• forming control circuitry for controlling the tuning of said transmitter/receiver antenna such that:
• (a) in the event that said measurement signal indicates optimal performance of said transmitter/receiver antenna relative to said predetermine optimal transmitter/receiver antenna signal, storing said measurement signal as said predetermined optimal transmitter/receiver antenna operation signal and (b) in the event that said measurement signal indicates less than optimal performance of said transmitter/receiver antenna, generating a tuning signal to antenna tuning circuitry associated with said transmitter/receiver antenna;
• and (c)repeating steps (a) and (b) until an optimal transmitter/receiver antenna performance condition exists.

An improved method for tuning a transmitter/receiver antenna of a recognition system transmitter/receiver circuit, said recognition system having an associated matching member which operates with a transponder to control a control mechanism of a device;

• the matching member and other non-matching members containing facilities each of which, when receiving energy transmitted from said transmitter/receiver antenna produces a respective unique recognition signal in said transponder;
• control of the device being possible only upon simultaneous occurrence of both operation of the control mechanism and production of a recognition signal by the matching member;
• wherein the improved static antenna tuning method comprises the steps of:
• converting a voltage signal to a measurement signal representative of transmitter/receiver antenna operation, said voltage signal arising from said transmitter/receiver antenna transmitting or receiving a recognition signal;
• comparing said measurement signal to a predetermined optimal transmitter/receiver antenna operation signal;
• and
• controlling the tuning of said transmitter/receiver antenna such that:
• (a) in the event that said measurement signal indicates optimal performance of said transmitter/receiver antenna relative to said predetermine optimal transmitter/receiver antenna signal, storing said measurement signal as said predetermined optimal transmitter/receiver antenna operation signal and (b) in the event that said measurement signal indicates less than optimal performance of said transmitter/receiver antenna, generating a tuning signal to antenna tuning circuitry associated with said transmitter/receiver antenna;
• and (c)repeating steps (a) and (b) until an optimal transmitter/receiver antenna performance condition exists.