Re: NEC-LIST: Linear Phased Antenna Array

I recall 77 ohms gives minimum loss and something like 30 ohms gives
max power handling. 50 ohms was a rough compromise. Hope this helps.

dan bathker

At 11:55 AM 2/27/2001 +0900, Hideho YAMAMURA wrote:
>Dear All,
>
>Could anybody tell me why the characteristic impedance of 50 ohms in
>coax. cables became a standard value ?
>
>I have believed that this is the minimum loss condition, but I found
>in an old Mushiake's book that it is around 77 ohms for air dielectric
>solid metal coax, and even higher when dielectric material filled.
>
>I highly appreciate any information.
>
>I apologize if this is not an suitable subject for the list, but I
>believe someone else may want to know too.
>
>==================================================
>Hideho YAMAMURA,
>Senior-Engineer,
>Hardware Technology Engineering Department,
>Advanced Product and Technology Development Operation,
>Enterprise Server Division,
>Hitachi, Ltd.
>==================================================
Received on Wed Mar 07 2001 - 00:00:09 EST