[Antennas] Trap Question

[James Duffer]

>From: Cletus W Whitaker <whitaker at pa.net>
>Subject: Re: [Antennas] Trap Question
>Date: Mon, 27 Sep 2004 00:25:02 -0400

>Let's jump start your thoughts on the subject.
>If the parallel LC trap is of infinite Q, and
>therefore presents infinite impedance at its
>resonance frequency, how is there a voltage
>developed across it if technically only one
>end of it is connected to anything?

Since we have jumped started our thoughts lets further consider. If we 
connect a voltmeter across an "open"  (close to an infinite impedance) in a 
circuit (not unlike a series filament string) what is the voltage? (Assuming 
the circuit is energized).  Wouldn't an antenna circuit with a trap be 
similar and there would be indeed be a voltage across the trap when 
considering the complete circuit (the radiator to free space and earth)??

>other hand a quarter wave stub used as a
>high impedance trap is tuned to the operating
>frequency.  Quarter wave stubs and LC traps
>don't act the same.  Wisdom is when you get
>a glimpse of why.  You're asking some very
>good well thought out questions.
>
>73  Clete
>
>