Re: NEC-LIST: How to design a feed network for a microstrip array?

Try also a search with the word RF combiners.

Dante JS Conti

"D. B. Miron" <dbmiron_at_paulbunyan.net> writes:
> Good day Xing,
>
> The word "array" implies that you want to operate several antennas on the
> same frequency to get an improved pattern. From your message, I gather
that
> you want to drive the two antennas at different frequencies from a common
> feed line. This is normally done by inserting a three-port network called
a
> diplexer between the feed line and the antennas. The diplexer does a
> low-pass/high-pass split and the complexity of the design depends on how
> sharp you want the band edges. I believe you can find a lot of info in
the
> printed literature, I don't know what you'll find on a web search. Good
> luck.
>
> Sincerely,
> Doug Miron
>
> ----- Original Message -----
> From: "chen xing" <xingcsc_at_yahoo.com.cn>
> To: <nec-list_at_robomod.net>
> Sent: Wednesday, May 17, 2006 5:09 PM
> Subject: NEC-LIST: How to design a feed network for a microstrip array?
>
>
> Hi all,
> I have designed two microstrip antennas. They have
> different size and cover different frequency bands
> (610MHz-960MHz and 1350MHz-1850MHz respectively), but
> their input impedances are the same, about 90 ohm at
> their working frequency bands. Now I try to integrate
> them on one PCB as an antenna array. I don't know how
> to design the array, especially how to design a feed
> network.
> Thanks,
>
> Xingc
>
>
>
>
>
>
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