[SI-LIST] Re: Capacitor S parameter
- From: Sukumar <sukumarm@xxxxxxxxxxx>
- To: olaney@xxxxxxxxx, si-list@xxxxxxxxxxxxx, weirsi@xxxxxxxxxx
- Date: Fri, 10 Jan 2014 18:58:31 +0100 (CET)
Hi Orin and Steve,
Thanks for your response.
My RF signal impedance is 50 ohm. RF signals are routed in the top layer
alone. Signal topology is,
DUT-trace- capacitor-trace-SMA. Capacitor is series connection with trace.
And capacitor value is fixed by my customer. I try to convey my customer.
Could you tell me, how you calculated capacitor impedance through .s2p?
Thanks,
Sukumar
Orin Laney <olaney@xxxxxxxxx> wrote: That's a 0.2 pF capacitor. Z at 5
GHz is 159 ohms. Perhaps you intended to use a larger value? Such small caps
are more often used for shunt tuning. Orin -----Original Message----- From:
si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf
Of Sukumar Sent: Friday, January 10, 2014 12:58 AM To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Capacitor S parameter Hi Experts, Currently I'm doing
a RF Signal S-parameter simulation. One series capacitor is connected with
RFSignal trace near the DUT side. RF Signal operating frequency is 5GHz. I
downloaded s parameter(.s2p) model from manufacturer website (
http://psearch.murata.com/capacitor/product/GRM1555C1HR20BA01%23.html[1][1]
)Capacitor part no:GRM1555C1HR20BA01 The insertion loss (S21)is very high up
to 10 GHz. Is this capacitor support 5GHz or this capacitor allows only
above10GHz Signal? How can i choose the capacitor which supports 5GHz?
Looking forward for SI Experts answers. Thanks, Sukumar --- Links --- 1
http://psearch.murata.com/capacitor/product/GRM1555C1HR20BA01%23.html[2]
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--- Links ---
1 http://psearch.murata.com/capacitor/product/GRM1555C1HR20BA01%23.html
2 http://psearch.murata.com/capacitor/product/GRM1555C1HR20BA01%23.html
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10 http://www.qsl.net/wb6tpu
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