Archive for the ‘Directional’ Category

Quasi Log Periodic End Fire Array (QLP) Feed Antenna

Saturday, February 23rd, 2008

cal amp antenna

Quasi Log Periodic End Fire Array (QLP) Feed Antenna

Specification :

http://www.calamp.com/pro_mmds_130093-130120.html

Page 5 lan23.ru
http://www.lan23.ru/forum/showthread.php?t=5&page=5

qlp feed

http://www.wireless-homebrew.com/wireless/page04.html

cal amp close

russians again

http://www.nag.ru/2003/0110/sirco-text.html

some pictures :

qlp antenna dimensionsqlp antenna dimensions

http://hft.uni-duisburg-essen.de/INICA2007/2003/archive/inica_2003/P06_Ibrahim.PDF

One of these build on lan23.ru

Quasi Log Periodic End Fire Array (QLP) Feed Antennaqlp antenna dimensionsqlp antenna dimensions

Here dimensions of my one :

http://www.digdice.com/qlp-antenna/

How to make our own reflector :

http://www.digdice.com/diy-hi-gain-antenna-on-cheap/

Polaplexer ?

Friday, February 15th, 2008

What is Polaplexer ?

“… The Polaplexer is a microwave antenna, or antenna feed, which supports two
simultaneous inputs or outputs that are independent and isolated from each other by use
of orthogonal (at right angles) linear polarization. The isolation can be as much as 30 –
35 dB. Its main use is to permit full duplex operation with a single antenna, in which one
port is used to transmit and the other to simultaneously receive
. As long as the transmit
power input to the Polaplexer is limited to 100 milliwatts or so, the receiver input stages
are unlikely to be damaged by the transmitter’s continuous output. …”

I never met this thing before it just came out from no were ! If anybody was tried this please post a comment.

http://www.ham-radio.com/sbms/sd/ppxrdsgn.htm

Polaplexer

For me is interesting can I use two wifi cards working on different channels with one antenna and this thing?

QLP Antenna

Thursday, February 7th, 2008

QLP Antenna

Freq around 2.4GHZ 😉

QLP WIFI Antenna

and back side 🙂

QLP WIFI Antenna