Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

[SOLVED] Horizontally Polarised Omnidirectional UHF Antenna

Status
Not open for further replies.

skymaster2010

Newbie level 3
Joined
Mar 28, 2010
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
Hobart
Activity points
1,302
Hello, Can anyone offer me help in a design approach to achieving Horizontally polarised omnidirectional UHF antenna for TV frequencies ie 470 - 860MHz.

I would like to achieve a 360 deg. radiation pattern variational of no more than +/- 5db, while at the same time having a reasonable band width response.

Any suggestions, material to look at, or experience had would be appreciated.
Thanks
 

Syncopator

Full Member level 6
Joined
Dec 15, 2010
Messages
368
Helped
70
Reputation
140
Reaction score
66
Trophy points
1,308
Location
N.E. Lincolnshire U.K.
Activity points
3,395
The only horizontal omni which comes to mind is the "halo". Never played with 'em, so don't know the gain to be expected. Neither do I know what bandwidth may be achieved.

There will be plenty of information on the web about 2m halos, which were/are quite popular. Perhaps that will help a bit.
 

RCinFLA

Advanced Member level 2
Joined
Aug 31, 2010
Messages
590
Helped
187
Reputation
378
Reaction score
186
Trophy points
1,323
Activity points
5,698
Another possibility is a 90 deg turnstile. Two right angle crossed half wave dipoles fed 90 degs out of phase.
 

betwixt

Super Moderator
Staff member
Joined
Jul 4, 2009
Messages
14,808
Helped
4,835
Reputation
9,688
Reaction score
4,622
Trophy points
1,393
Location
Aberdyfi, West Wales, UK
Activity points
126,063
the Alford slot is another one that meets the requirement and it can provide quite high gain as well.

Brian.
 

skymaster2010

Newbie level 3
Joined
Mar 28, 2010
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
Hobart
Activity points
1,302
I will do some reading on the designs mentioned, feed back appreciated
skymaster 2010
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top