UWB Log Periodic Antenna, 600MHz to 6000MHz 50W High Gain WiFi Ultra Wideband Log Periodic Antenna for Industrial Field

The aerial consists of 19 dipoles in conventional log-periodic layout. A 20th element at the back end seems to act partially as a reflector but also as a capacitively-implemented matching stub, which is quite ingenious. The quoted gain of 6-7dB is probably dBi rather than dBd but, for such a short aerial, this would be about right. Construction quality is excellent. I have used this, in conjunction with a portable spectrum analyser for carrying out surveys to determine the best locations for installing infrastructure like mobile phone signal repeaters and wi-fi extenders. For this purpose, the aerial is entirely satisfactory and impressive. The directivity is not brilliant but entirely consistent with its small size. The beam width is around 90 degrees - slightly better at higher frequencies. The front-back ratio is around 15dB which is very useful. In terms of frequency response, I have used this as low as 650MHz on TV transmissions and the measures signal level is comparable to that from a similar sized log-periodic designed for TV reception. At the higher end, I have only used it as far as 2.4GHz for locating wi-fi routers and BlueTooth devices ... and again the performance is faultless. My local mobile mast's highest frequency is 1.8GHz but I hope to test the aerial at higher frequencies when I'm in an area where higher frequencies are used.For test and measurement purposes, this aerial has become an essential part of my toolkit. As ever, if fixed frequency band reception is your main aim, then a dedicated, band-specific, aerial will always be better, but for field surveys and general wide-band signal measurements, this cannot be beaten for its compact size, build quality and price-performance.

It’s not a normal log periodic by design and it has a slightly weird performance.Whether intentional or not, the shortened back element and the diagonal ends of the forward elements changes the return loss and the gain.

you're looking for a UWB antenna at a decent price?That's the one!I'm using a couple indoor on my LTE router, definitely better that the omnidirectional provided with.As there's no housing, before planning that outdoor, think about an adequate box (plastic), otherwise it wont last long, and will have issues if under the rain.