[SI-LIST] Re: Help Request
- From: steve weir <weirsi@xxxxxxxxxx>
- To: "Aditya @ Reliant EDS" <aditya@xxxxxxxxxxxxxxx>
- Date: Thu, 09 Feb 2012 12:34:26 -0800
Aditya, Pull back the polygons in the antenna area. The Signal
Integrity Analysis group your company advertises should be able to
address generating an appropriate stack-up, placement, and polygon
generation to meet your requirements.
Steve
On 2/9/2012 7:20 AM, Aditya @ Reliant EDS wrote:
> Dear Sir
>
> I have a query, we shall be grateful if you could help advise on the
> same.
>
> We have been testing the 100W PA RF boards
>
> Unfortunately the performance is below the expected mark.
>
> The electrical connectivity appears to to be OK however the signal
> parameters and performance could not be achieved on this PCB.
>
> After extensive testing and analysis we reached conclusion that the
> performance deterioration is due to extremely high inter layer board
> capacitance. The board's die-electric capacitance is acting as a
> capacitor of very poor quality on HF frequencies. Resulting in
> bypassing the RF signal in the region of 30Mhz @ 12W per about 2.5-3
> sq inches.
>
> We need a possible solution to this problem from the point of PCB
> Manufacturing
>
> Best Regards
> Aditya
>
> --------------------------------------------------
> From: "steve weir" <weirsi@xxxxxxxxxx>
> Sent: Monday, November 07, 2011 11:52 PM
> To: <si-list@xxxxxxxxxxxxx>
> Subject: [SI-LIST] Re: Hspice model versus spice model
>
>> Differences where they occur are model specific. Different dialects of
>> SPICE have different features, for instance some have a frequency
>> keyword that can be useful in AC analysis for things like skin effect.
>> The choice of HSPICE is usually a matter of supplier / customer
>> relationship. Encrypted HSPICE is the accepted standard, like it or not
>> for IC I/O models.
>>
>> Steve
>> On 11/7/2011 9:27 AM, Bernadine Splettstoeszer wrote:
>>> what is a good summery of the performance differences in models and
>>> analysts capabilities between Synpsys Hspice and Saber and Spice?
>>> Sent from my Windows Phone
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>>
>>
>> --
>> Steve Weir
>> IPBLOX, LLC
>> 150 N. Center St. #211
>> Reno, NV 89501
>> www.ipblox.com
>>
>> (775) 299-4236 Business
>> (866) 675-4630 Toll-free
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>>
>>
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>
--
Steve Weir
IPBLOX, LLC
150 N. Center St. #211
Reno, NV 89501
www.ipblox.com
(775) 299-4236 Business
(866) 675-4630 Toll-free
(707) 780-1951 Fax
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