AmateurRadio.com

It looks like the Microvert antenna may have originated in Japan? The Microvert is a very compact antenna. Some believe the coax is a major part of the radiating system. Having never tried this sort of antenna I am unable to comment.  This was posted to the Microvert Yahoo group earlier:

Whether you believe it’s the coax radiating or not, this is still interesting:

The Super Rad Antenna (Induced Secondary Radiation Antenna)

	The Super Rad Antenna (Induced Secondary Radiation Antenna) The Super Rad Antenna (The Induced Secondary Radiation Antenna) was thought up in 2006. It has high performance although small size.
	View on t54979899.blogspot.co.uk	Preview by Yahoo

There are other websites about SRA (secondary radiation antenna), but unfortunately all in Japanese. Its definetly a Japanese thing!

I have all the parts required here to make one of these. Whether you believe its the coax radiating or not the results will be interesting.

Rob
M0RZF

PS. My old 10m/12m modified microvert gives a good SWR.

See http://t54979899.blogspot.co.uk/?view=classic.