Re: [SI-LIST] : Coax connection to a CPW guide

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From: Mark Randol (m.randol@motorola.com)
Date: Fri Mar 31 2000 - 16:24:42 PST


I missed out on the earlier discussions, so I hope I'm not
duplicating.

I agree with Ray, Walt, et al, that a microstrip launch would
probably work fine. To connect through an enclosure, you need a
connector with a longer threaded barrel. Check Lighthorse
Technologies @ www.rfconnectors.com

-- 
Mark Randol, RF Measurements Engineer
Motorola SPS, Inc.
M/S EL381
2100 E. Elliot Road
Tempe, AZ 85284
(480)413-8052 Voice
(480)413-3455 FAX
M.Randol@motorola.com

Ray Waugh wrote: > > I am not certain what Guido is trying to do here, but I can offer two > suggestions: > > 1. Use a conventional SMA connector on a microstrip, and then make a > transition from microstrip to CPW on the board, as shown in Figure 9 of > AN1167 (attached). Mount your CPW package on the board's CPW line. > > 2. Take Walt's advice and use the EFJohnson edge mount connector. With > ground fingers on both the top and bottom surfaces of the board, it > makes a good CPW launcher. However, since it mounts to the edge of the > board, > I don't know how you'd integrate that into a housing. > > Ray > ------------------------------------------------------ > Raymond W. Waugh - WSD Applications > E-mail: ray_waugh@agilent.com > > USPS: Agilent Technologies > Wireless Semiconductor Division > 39201 Cherry Street, MS NK20 > Newark, California 94560 > ------------------------------------------------------ > > -----Original Message----- > From: Walt Kreiger [mailto:reiki@together.net] > Sent: Friday, March 31, 2000 4:45 AM > To: si-list@silab.eng.sun.com > Cc: Jill Borchers-Johnston > Subject: Re: [SI-LIST] : Coax connection to a CPW guide > > Guido, > I might suggest you try something like a Johnson Components launcher, > but > the mechanics might be impossible. It is a very clean coax to microstrip > launch, but you'd need some em simulation to get the CPW right. The > microstrip launch is supposed to be good for 18GHZ; I've used them and > they > seem to be that good. > To attach to the outside of a housing may not be easy; through a > housing > might be reasonable. > I'm interested in the solution to your problem. Please, copy me on > anybody's suggestions. > Thanks, > Walt Kreiger > Applications Engineering > Performance Test Div of Probe Technology > > ----- Original Message ----- > From: Guido Hunziker <guido@alumni.caltech.edu> > To: <si-list@silab.eng.sun.com> > Sent: Thursday, March 30, 2000 5:08 PM > Subject: [SI-LIST] : Coax connection to a CPW guide > > > Folks, > > > > can anybody suggest a good supplier of a kit that would allow me to > > interface from a coax connector (say, SMA) to a coplanar waveguide (good > > up > > to 10 GHz). > > > > My CPW guide is on a chip inside a package, and the connector would be > > attached to the outside of the housing. > > I used a product from Huber&Suhner many years ago, but that doesn't > > exist > > anymore. > > > > Suggestions? > > > > Thanks > > > > Guido Hunziker > > > > [ATTACHMENT DUMPED BY SYSTEM DUE TO EXCESS SIZE]

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