[Antennaware] Negative Impedance Converter NIC

Andy Ikin andrew.ikin at btopenworld.com
Mon Sep 13 13:17:08 PDT 2010


Guy,

NIC stands for Negative Impedance Converter.  These are active devices that 
have a negative resistance i.e. the voltage is 180 degrees out of phase with 
the current.
They can be uses to cancel out either antenna capacitive or inductive 
reactance to broaden the bandwidth; so called Non Foster Matching

See attached link.

Matching network design using non-Foster .

73

Andrew



----- Original Message ----- 
From: "Guy Olinger K2AV" <olinger at bellsouth.net>
To: "Andy Ikin" <andrew.ikin at btopenworld.com>
Cc: <antennaware at contesting.com>
Sent: Monday, September 13, 2010 8:07 PM
Subject: Re: [Antennaware] Negative Impedance Converter NIC


I'm probably not the only one...please define NIC.  That comes up in
my head as Network Interface Card.  73, Guy.

On Mon, Sep 13, 2010 at 2:38 PM, Andy Ikin <andrew.ikin at btopenworld.com> 
wrote:
> Hello Folks,
>
> Is it possible to use NIC to overcome losses in terminated loop antennas? 
> If so, how would one measure the NIC input impedance with say a Signal 
> Generator and an Oscilloscope to check for correct NIC performance?
>
> 73
>
> Andrew Ikin G8LUG
>
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