[Antennaware] Negative Impedance Converter NIC

[Guy Olinger K2AV]

Hi, Andy.  Thanks.

However, attachments do not make it through the reflector.  Please
embed the link url in the text proper and resend.

73, Guy.

On Mon, Sep 13, 2010 at 4:17 PM, Andy Ikin <andrew.ikin at btopenworld.com> wrote:
> 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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>>
>
>
>