On Fri, 18 Apr 2008 02:58:13 -0700 (PDT), Adam Chapman
<adam.chapman@student.manchester.ac.uk> wrote:
>I'm looking at splitters to use on my small aircraft which has two
>antennas broadcasting video data.
At what frequency? You can get power dividers that are fairly narrow
band and are optimized for a range of frequencies, or you can get
broadband devices that cover a large range of frequencies. Also, what
power level are you transmitting? Power dividers have some loss and
will smoke if over driven. Also, does it have to be TSO approved?
Is your "small aircraft" aluminum body or fiberglass? If fiberglass,
you install the antennas inside. However, that means that the two
antennas will "see" each other, which means your antenna pattern will
probably be full of nulls and peaks. Power splitting between dual
antennas really only works if the antennas are on opposite sides of a
a shielded (aluminum) body, and cannot "see" each other.
>I'm new to RF stuff, could somebody please tell me what 'power pass'
>means and what it causes to happen?
Power pass means that it will pass DC power. That's usually in
reference to running satellite dish LMB front ends, or tower mounted
antenna amplifiers for over the air TV. It's also necessary for tower
mounted bi-directional amplifiers, sometimes used for Wi-Fi. Unless
you have some electronics mounted in the antenna, I don't think this
is a requirement for your unspecified hardware.
>I'm looking at splitters similar to the first two at
>http://www.rgsplit.com/servlet/the-S...ass/Categories,
>but if anybody knows of a lightweight option that would be great.
I'm goint to *ASSUME* that you're only interested in 2.4GHz. See:
<http://www.hyperlinktech.com/web/signal_splitters_2400_2way.php>
You can also make your own:
<http://www.qsl.net/yu1aw/2G4spliter2.gif>
<http://www.qsl.net/yu1aw/2G4spliterN.gif>
It's fairly simple. Again, this is for 2.4GHz only, not a wide range
of frequencies.
--
Jeff Liebermann
jeffl@cruzio.com
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060
http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558