¿ªÔÆÌåÓý

  1. Tinysa
  2. Messages
Single Messages Topics Expanded Polls

Re: TinySA Antenna

 

¿ªÔÆÌåÓý

John,

I measured SWR of tinySA Telescopic Antenna by NanoVNA SAA2.

The antenna with max length has good SWR at 300MHz and 740MHz.

It has very bad SWR under 300MHz.

¤Ç¤Ä good grief?





? tommie from Tokyo, JP

2021/09/22 2:52¡¢John Cunliffe W7ZQ <n2nep@...>¤Î¥á©`¥ë:

?Tommie

The impedance of a telescopic antenna is nowhere near either 75 nor 50 ohms unless adjusted in length to a specific frequency. It will then be impedance matched on this one frequency only. Any telescopic antenna with SMA connector will work. The input of the TinySA however is 50 ohms.


John

Join [email protected] to automatically receive all group messages.