| Author |
Message |
deepak007
Joined: 20 Sep 2007
Posts: 71
|
 26 Aug 2008 18:26 ANTENNA HELP |
|
|
|
hello
i have purchased a WOUXUN transceiver134 to 174 MHz. but, the seller gave me a 400 to 470 MHz high gain antenna. will there be any change in performance? can i make my own antenna using a coat hanger cut to the correct 1/4 length? then how can i connect to the SMA FEMALE CONNECTOR.i mean how can i connect a whip to SMA CONNECTOR. please give me some tips.
|
|
| Back to top |
|
 |
Azulykit
Joined: 18 Feb 2007
Posts: 795
Helped: 100
Location: All over the Map.
|
| 26 Aug 2008 22:47 Re: ANTENNA HELP |
|
|
|
Everyone knows that a coat hanger is an excellent antenna. Make sure that it is not made from wood.
Your high gain antenna is for a different band. I would not expect it to work well in a band different from the intended band. Do you think differently?
It sounds like you want to make a monopole. That implies a groundplane, the bigger the better. The flange on the sma connects to the groundplane and the center contact connects to the coat hanger.
|
|
| Back to top |
|
|
sigint
Joined: 01 Jan 1970
Posts: 1034
Helped: 14
Location: State of total confusion
|
| 26 Aug 2008 23:27 Re: ANTENNA HELP |
|
|
|
My best results have been with plastic coathangers drilled out 1/4 wave and a metal rod glued to the interior, the base of the coathanger can be done like-wise to use as a tuning stub. coax may be soldered to the the first rod and the shield can be glued to the outside, be sure to use epoxy, wood glue as a well as a wood coathanger won't work.
SiGiNT
|
|
| Back to top |
|
|
sigint
Joined: 01 Jan 1970
Posts: 1034
Helped: 14
Location: State of total confusion
|
| 27 Aug 2008 21:08 Re: ANTENNA HELP |
|
|
|
Seriously, just in case you are serious, get a ham 2 metre rubber-ducky antenna and a right angle BNC to SMA adaptor.
SiGiNT
|
|
| Back to top |
|
|
Azulykit
Joined: 18 Feb 2007
Posts: 795
Helped: 100
Location: All over the Map.
|
| 27 Aug 2008 21:12 Re: ANTENNA HELP |
|
|
|
| The really important feature is the color of the coat hanger. I have one survey that says that pink is the only color to use.
|
|
| Back to top |
|
|
deepak007
Joined: 20 Sep 2007
Posts: 71
|
| 28 Aug 2008 3:46 Re: ANTENNA HELP |
|
|
|
thank you very much gentlemen for your suggestions! i want to use the transceiver on 160MHz. i have purchased a brass brazing rod from a welding supply store.i have cut it to 18 inches. and i am using a rolled up copper sheet as a ground plane. can anybody give any idea to construct a high gain antenna for 160MHz? for ex. coil loaded or any other type.
thanku once again.
|
|
| Back to top |
|
|
Azulykit
Joined: 18 Feb 2007
Posts: 795
Helped: 100
Location: All over the Map.
|
| 28 Aug 2008 17:32 Re: ANTENNA HELP |
|
|
|
You might consider a corner reflector as an easy way to increase the gain. Kraus is a good source for guidance.
You do not say what you consider to be "high" gain.
|
|
| Back to top |
|
|
webdog
Joined: 13 Nov 2001
Posts: 114
Helped: 10
|
| 31 Aug 2008 22:43 Re: ANTENNA HELP |
|
|
|
| deepak007 wrote: |
thank you very much gentlemen for your suggestions! i want to use the transceiver on 160MHz. i have purchased a brass brazing rod from a welding supply store.i have cut it to 18 inches. and i am using a rolled up copper sheet as a ground plane. can anybody give any idea to construct a high gain antenna for 160MHz? for ex. coil loaded or any other type.
thanku once again. |
You will not get "high gain" by using this 18 inch rod! This might be put into work as a 1/4 wave radiator, and if you mount it on a metal surface you end up with roughly 0 dB gain!
The coil will only add losses to the antenna so that is no good!
A 5/8 lambda radiator will offer some gain, but to get "high-gain" you really need something bigger, and probably a rotator as the antenna will be directive.
|
|
| Back to top |
|
|
