http://en.wikipedia.org/wiki/Yagi-Uda_antenna article starts A Yagi-Uda antenna, commonly known simply as a Yagi antenna, is a directional antenna consisting of multiple parallel dipole elements in a line
Unless you face a special requirement - you are better off with some sort of collinear (conventional, franklin, etc)
Announcement
Collapse
No announcement yet.
Hong Kong Radar
Collapse
X
-
Anyone think antenna array is possible for 1090Mhz ?
If yes, how to do that ?
Leave a comment:
-
Originally posted by F-VHHH4 View PostFor my case, the antenna is ship from FR.
But I`m feeling that antenna is not a very good yet.
Leave a comment:
-
For my case, the antenna is ship from FR.
But I`m feeling that antenna is not a very good yet.
Leave a comment:
-
Originally posted by F-VHHH4 View PostCan you send me again the link ? Is that from Taobao ?
How`s your result after installed a new Antenna ?
The result of new antenna is much better than my homemade antenna.
Leave a comment:
-
This model is my next target:
X700H/X700HN: 144/430MHz(2m/70cm)
Length:7.2m / Radial length:approx.52cm / Weight:3.8kg
Gain:9.3dB(144MHz),13.0dB(430MHz) / Max.power rating:200W (Total)
Impedance:50ohms / VSWR:Less than 1.5:1 / Rated wind velocity:40m/sec
Mast diameter accepted:30mm to 62mm(More than 45mm diameter mast is recommended) / Connector:M-J(X700H),N-J(X700HN)
Type:4x5/8wave C-Load(144MHz),11x5/8wave C-Load(430MHz),FRP outershell
Leave a comment:
-
Originally posted by F-VHHH4 View PostMy Dual band Antenna bought from local HAM shop.
But we will install a new 7.2M Antenna for larger radio coverage.
Thanks,Last edited by North Borneo Radar; 2014-10-12, 08:40.
Leave a comment:
-
Originally posted by North Borneo Radar View PostPerhaps you are too busy posting posts around FR24 forum to leave prints to promote your website and running your website so you misquoted me. We all make errors, it's ok.
And please read all 919 of my posts here before you start making unfounded allegations about my motives or contributions.
Leave a comment:
-
My Dual band Antenna bought from local HAM shop.
But we will install a new 7.2M Antenna for larger radio coverage.
Thanks,
Leave a comment:
-
Originally posted by F-VHHH4 View PostWhat is FR24 MLAT ?
So far, the range is very good. It can received very far from China side, but it is hard to received from the Ocean side.
Do you have any idea of feeding Airband? I can also do that.
I can hear VMMC, VHHH and ZGSZ from the Airband.
I don`t have HK local contact for FR24 at this moment.
VHHH has already have got an air band feeder, if you join in then maybe the frequencies could be splitted to allow better listening. You can contact Live ATC for more advice. Where did you get your VHF/UHF antenna? Just curious.
As for modeS, it is one of the communication protocols that is standardized for aviation transponders. Please see: http://en.wikipedia.org/wiki/Aviatio...rogation_modes (wiki and google is a good place to start). mode S will be enabled by the FR24 team if there is enough FR24 receivers to perform MLAT - locating planes that do not broadcast their GPS position aka ADS-B.Last edited by North Borneo Radar; 2014-10-12, 06:48.
Leave a comment:
-
Originally posted by twfr View PostI bought a cheap 9db 1090mhz antenna from China http://item.taobao.com/item.htm?spm=...876711834&ns=1 and no minimum order is required.
Although the antenna costs about RMB$170 (US$ 28), the result is excellent. You could give it a try.
Leave a comment:
Leave a comment: