[SI-LIST] Re: Differential Netwrok Analyzer
- From: dgun@xxxxxxxxxx
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 21 Jan 2005 12:50:25 -0800
Brett,
Thanks for your reply. I am indeed interested in non-linear diff
characteristics, which can only be measured by applying a true
differential stimulus (think of the LO of a balanced mixer, for
example--small signal drive won't cut the mustard).
Where can I find more info about differential load pull and differential
LSNA?
--
Daniel
From: "Grossman, Brett" <brett.grossman@xxxxxxxxx>
>=20
> Daniel,
>=20
> If what you are referring to as a "true differential analyzer" is one
> which drives separate differential or common mode stimulus, then to the
> best of my knowledge the answer is no. Bockelman and Eisenstadt refer
> to this type of configuration as a "pure-mode" network analyzer in their
> publications. Though I have spoken to a few people/companies who have
> attempted to build these types of designs, I no of none that has
> marketed one commercially.
>=20
> My guess is that your interest is driven by a need to measure
> differential network parameters of non-linear devices (otherwise,
> arguably the multi-port offerings that have been discussed could be
> reasonable). You may/or may not be able to consider alternate systems
> (such as differential load-pull or LSNA) to get the measurement data you
> are looking for.
>=20
> Best regards,
> -Brett
>=20
>=20
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of dgun@xxxxxxxxxx
> Sent: Thursday, January 13, 2005 10:45 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Differential Netwrok Analyzer
>=20
> I don't know of any commercially available true
> differential VNAs. However, in addition to the
> ENA mentioned below (which transforms 4-port
> s-parameters to mixed-mode or differential
> s-parameters), there is also a 4-port 20 GHz:
> PNA N5230A (Option 240/245).
>=20
> I'm interested to know if there is a
> commercially-available true differential
> analyzer.
>=20
> --
> Daniel
>=20
> From: "John Lin" <John@xxxxxxxxxxxx>
> > =3D20
> > Tim,
> > =3D20
> > I think you are looking for 4 port VNA.=3D3D20
> > Agilent has one -ENA E5071B, 8Ghz.
> > =3D20
> > John=3D3D20
> > =3D20
> > -----Original Message-----
> > From: si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx] =3D
> =3D3D
> > On Behalf Of TTSP (Timothy Pak)
> > Sent: Thursday, January 13, 2005 5:13 AM
> > To: 'SI-List '
> > Subject: [SI-LIST] Differential Netwrok Analyzer
> > =3D20
> > All,
> > Has any one of you ever used differential network analyzer? Do you
> know =3D
> =3D3D
> > which companies are making the equiment?
> > Thanks,
> > Tim
>=20
> --=3D20
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