Backscattering for circular polarisation

1966 ◽  
Vol 2 (9) ◽  
pp. 341 ◽  
Author(s):  
M.W. Long
Keyword(s):  
Circular Polarisation

New printed antenna and array with circular polarisation

1996 ◽  
Vol 32 (9) ◽  
pp. 785 ◽  
Author(s):  
A. Nešić ◽  
I. Radnović ◽  
M. Mikavica
Keyword(s):  
Printed Antenna ◽  
Circular Polarisation

Four square loops antenna for circular polarisation and gain enhancement

2010 ◽  
Vol 46 (7) ◽  
pp. 475 ◽  
Author(s):  
Q. Yang ◽  
X. Zhang ◽  
X. Bai ◽  
N. Wang ◽  
Y. Wang ◽  
...  
Keyword(s):  
Circular Polarisation ◽  
Gain Enhancement ◽  
Four Square

scholarly journals Detection of new sources of 4765-MHz OH masing

2002 ◽  
Vol 206 ◽  
pp. 112-115
Author(s):  
Richard G. Dodson ◽  
Simon P. Ellingsen
Keyword(s):  
Star Formation ◽  
High Resolution ◽  
Ground State ◽  
Theoretical Models ◽  
Maser Emission ◽  
Circular Polarisation ◽  
Peak Flux ◽  
Star Formation Regions ◽  
Compact Array

We have used the Australia Telescope Compact Array (ATCA) to make a sensitive search for maser emission from the 4765-MHz transition of OH towards a sample of 55 star formation regions. Maser emission with peak flux densities in excess of 100 mJy were detected in 14 sites, with 10 of these being new discoveries. Unlike the ground-state OH transitions the 4765-MHz transition is not predicted to be circularly polarised and none of the masers observed have detectable levels of linear, or circular polarisation. Combining our results with those of previous high resolution observations of other OH transitions we are able to investigate various theoretical models for the pumping of OH masers.

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