Search found 43 matches

by HighSNR
Sat Nov 10, 2018 7:37 am
Forum: Antennas
Topic: Hotter SDR?
Replies: 3
Views: 14479

Re: Hotter SDR?

When I connect an antenna directly(without cable) to my LimeSDRmini the antenna acts as a bit of a heatsink and helps to keep it cool. Still sits at about 50c though. When I use a cable I loose a lot of this effect.
by HighSNR
Wed Nov 07, 2018 7:55 am
Forum: Antennas
Topic: My new DIY Planar disk antenna
Replies: 2
Views: 14269

Re: My new DIY Planar disk antenna

That should work well. You basically have two radiation modes. These modes should seemlessles transistion between each other. 1st is a fat dipole that will cover the lower bands. Lower frequency will be dictated by the total height of the antenna(lambda/2) 2nd is like a Vivaldi antenna that will giv...
by HighSNR
Thu Nov 01, 2018 9:17 pm
Forum: Antennas
Topic: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+
Replies: 14
Views: 35329

Re: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+

Hi Phil, Seems like it took a while to reach you. Not a great advert for our Royal Mail. Glad it turned up in the end tough.
by HighSNR
Tue Oct 09, 2018 9:27 pm
Forum: Antennas
Topic: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+
Replies: 14
Views: 35329

Re: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+

Hi Airwind, I don't have any current plans to sell on ebay. Never say never though. Tindie has worked really well for me and I wasn't aware of any problems with paypal on Tindie. Its how I recieve my funds from them and I havent had a problem. They also give the buyer a bit more protection than ebay...
by HighSNR
Sun Oct 07, 2018 9:44 am
Forum: Antennas
Topic: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+
Replies: 14
Views: 35329

Re: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+

No problem. A bit more info on my new spiral antenna design here. https://hexandflex.com/2018/10/05/spiral-antenna-part-2-modelling-and-simulation-with-openems/amp/ I'm expecting the first prototype back from the fab this week, so its still untested. I also have a couple of nice extra features in th...
by HighSNR
Wed Oct 03, 2018 4:36 pm
Forum: Antennas
Topic: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+
Replies: 14
Views: 35329

Re: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+

Hi Phil,

Got your order. As it's your birthday, I have packed 2 for the price of one. :ugeek:
by HighSNR
Sun Sep 30, 2018 8:45 am
Forum: Antennas
Topic: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+
Replies: 14
Views: 35329

Re: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+

Hi Phil, Good to hear that its interesting to people other than me. So you are aware of the likely timescales. I'm still awaiting the first prototype back from the fab. If it passes my initial testing I then need to send it over to the measurement lab for some proper testing. There is a risk that it...
by HighSNR
Wed Sep 12, 2018 8:18 pm
Forum: Antennas
Topic: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+
Replies: 14
Views: 35329

Re: Ultra-WideBand Vivaldi Antenna 800MHz to 6GHz+

Hi Phil, this is my antenna. It should work as a feed for a c band dish. To get optimum results you would need the beamwidth of the antenna to be matched to the diameter of the dish. Otherwise you risk loosing some gain with if the feed antenna spills over the sides of the dish. You might also consi...
by HighSNR
Fri Jul 06, 2018 7:53 am
Forum: Antennas
Topic: Antenna
Replies: 1
Views: 2681

Re: Antenna

Hi Charlie1, It really depends upon what frequencies and directivity you need. The RTL-SDR store here sells a dipole kit that would be ok for many tasks. This lets you adjust the telescopic elements to tune the frequency of operation. I also sell an ultra-wideband antenna on Tindie which optimised f...