For submarine VLF communication, is the trailing wire antenna just a long wire monopole, or does it contain a specific antenna design (loop, slot, multi-turn, etc.)? Looking for any publicly available technical information. Thanks in advance.
What on earth is this!
It has been up and running for about2 months in London as per address.
Anyone?
Tired of always getting crappy reception on the 2 VHF channels in my area, which even a pricey Clearstream 2V didn't really help much with, I built a tuned yagi for about $8 that gets a crystal clear signal.
Foam board + copper tape, and then the coax cable from one of those cheap panel antennas wrapped through some ferrite cores, it gets 5dB better than the best signal strength the clearstream2v could get. Also handles UHF channels fineish because they're pretty strong around here anyway.
I have a shop building out in the country and I need 20+ ft of height to pull in a distant favorite FM station. I'd also possibly put up a TV antenna, and I already have a cell phone booster that would go up too.
I've been looking at ground based towers but they are kinda pricey and the building is already there. It has a 20 ft. high, peaked, sheet metal roof. I'd put up a tripod to get everything at least 3-5 ft above the roof peak. Just wanted to make sure that the expanse of sheet metal wouldn't interfere with the signal.
Seen on the peak of Beech mountain in Acadia NP. My assumption is for VHF comms. The yagi is angled towards cadilllac mountain. Both the Omni and yagi in these photos are attached to the fire tower. Where is the data of these antennas sent to and how?
Hi everyone, I designed a microstrip antenna, the simulation results have good return loss at the targeted resonance frequency, but when I checked the gain was very low, only 0.3 dB.What are the problems and solutions?