antenna dual band 1575MHz Bw=40MHz 2300MHz Bw=50MHz

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sonnh87

Joined: 03 Oct 2009
Posts: 3
Location: Ha Noi

27 Oct 2009 15:42 antenna dual band 1575MHz Bw=40MHz 2300MHz Bw=50MHz

hello every body,
i am a newbie in ads. i have project to design an dual band antenna working at 1575Mhz Bw=40Mhz and 2300Mhz Bw=50Mz. how can i design it?
thank you.

ravi8331

Joined: 04 Jul 2008
Posts: 337
Helped: 95
Location: India

28 Oct 2009 14:10 Re: antenna dual band 1575MHz Bw=40MHz 2300MHz Bw=50MHz

i think first u decide which type of antenna do u want to design e.g. microstrip antenna, PIFA or dipole etc.
after that anyone can help u.

sonnh87

Joined: 03 Oct 2009
Posts: 3
Location: Ha Noi

28 Oct 2009 17:04 Re: antenna dual band 1575MHz Bw=40MHz 2300MHz Bw=50MHz

ravi8331 wrote:

i think first u decide which type of antenna do u want to design e.g. microstrip antenna, PIFA or dipole etc.
after that anyone can help u.

i decided to design microstrip antenna and i found this paper(Submitted By:- Nandish Mehta). But this antenna working at 1.85 Ghz and 2.37Ghz. how can i change the frequency?

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ravi8331

Joined: 04 Jul 2008
Posts: 337
Helped: 95
Location: India

29 Oct 2009 7:29 Re: antenna dual band 1575MHz Bw=40MHz 2300MHz Bw=50MHz

here u deeply go through this paper and then see which parameter used by author for dual frequency band and for widening the bandwidth e.g. slot length and width used for this purpose so u can introduce different type slot for this purpose.

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sonnh87

Joined: 03 Oct 2009
Posts: 3
Location: Ha Noi

29 Oct 2009 18:57 Re: antenna dual band 1575MHz Bw=40MHz 2300MHz Bw=50MHz

ravi8331 wrote:

i do as this paper but my S11 look so weird, its graph look likes a line. Sad

ravi8331

Joined: 04 Jul 2008
Posts: 337
Helped: 95
Location: India

30 Oct 2009 4:59 Re: antenna dual band 1575MHz Bw=40MHz 2300MHz Bw=50MHz

so for doing this u hv gone through the litrature in which u see the dual band antenna design and widening the bandwidth topics and from there u get some techniques by using that u can achieve ur goal........

ahsaan

Joined: 25 Apr 2009
Posts: 54
Helped: 2
Location: Pakistan

07 Nov 2009 16:40 Re: antenna dual band 1575MHz Bw=40MHz 2300MHz Bw=50MHz

Frequency is generally changed by changing the dimensions of the patch like width and length.. I havent looked at the paper u submitted but u can try changing dimensions