1. Fred points out that if NRAO decides to work on the MMIC, they will have all rights to the Weinreb/Ericson design. So, perhaps we can fund NRAO to do the InP LNA wafer runs carrying the Weinreb, ATNF design and our own, in exchange for their packing and testing enough MMIC HEMTs for AMiBA.They can sell us the packaged MMIC HEMTs to us at a reduced cost. Fred will keep on discussing this possibility with John Weber.
2. A short report by email from Jeff, he mentioned about Sandy’s design can be used for any ground based radio astronomy project, his approval to use the design is sufficient, and he will allow us to fabricate the approx. 60 devices we need on an upcoming wafer on a shared cost basis. TRW just did this for Umass, the quickest way to get TRW to agree is to copy the Umass agreement: use for ground based radio astronomy only. He also mentioned that Neil may be able to provide a handful of prototype units, unpackaged, and Sandy suggested we could hire a contractor to assembly and cryo-test amplifier modules. Jeff will contact Neil to discuss this further.
3. A separate meeting to go over all of the MMIC issue will be held by next Monday 2P.M.
4. After this meeting, Huei will arrange a lab tour at E.E. Department for Warwick

K.Y.Lo

J.Peterson

B.Martin

H.Wang

Ongoing

Ongoing

Action item

1. Leo suggests buying the phase switches now for prototype.
2. Warwick says that they have been a bit look at other approach; one of them is the Silicon Gemanium. There is one company, they have a new silicon gemanium process coming up with 70GHz, and it probably is ok. And the pricing is if we order $20KUSD, and will get us 10 samples of circuit abroad the size we need for multipliers. It is something they should look into, it’s a fairly small atelier to do the development in that area and see how we go. We probably get something back in 6 months or so. Warwick just starts talking with them now, and will sign a NDA with them very soon. Warwick will send that company information to Huei.
3. Bob will set up a separate meeting with Jeff and Warwick to go over the correlator issues after Warwick back.
4. Jeff is waiting for the delivery of the components for the prototype, and then he will take some time to assemble and test it. He plans to bring the mixer base correlator to the AMiBA 2001 conference in June for prototype testing. As for the interface and interaction with the backend processing system, Jeff and Ray should keep on talking with Warwick to ensure the whole correlator system integrated properly. Jeff will send a sketch of layout circuit of lag correlator to Ray and Mingtang to look at.
5. Ray says he got 16 chips of backend processing IC; it should be enough for the prototype testing. As for the LNA, he will talk to Warwick further when he is here in Taipei next Thursday as well.

H.C.Lu
W.Wilson

B.Martin

J.Peterson
R.Wei
 

J.Peterson

R.Wei

Ongoing
Ongoing

Ongoing

Ongoing

Action item

Ongoing

1. Mal will follow up to see if he can get a beam pattern analysis on the feed horn and antenna to see how accurate we can simulate the lens
2. Regarding the modeling on the circular polarization, Mal will send a report around to everyone to look.
3. Regarding the NRAO OMT production,NRAO people is looking for another two possible shops to manufacture OMT in order to speed up the process. M.T. will keep on watching it. The Chungshang Instituteis still working on the pricing.
4. Bob has modified the specification of small dish a little bit; we will post both of the specification of large dish and small dish as well as the conceptual drawings on web site
5. Regarding the near field range measurement for AMiBA antenna, Leo has discussed with the local agent about the possibility to upgrade Prof. Chu’s lab in order to carry on the measurement on AMiBA antenna. He will work out an equipment list and send it everyone to look at. After this meeting, Leo will arrange a lab tour of E.E. Department for Warwick and Bob as well.

M.T.Chen

J.Cheng

H.C.Lu

Ongoing

Ongoing

Ongoing

Action item

1. We just received a dual channel power meter and a noise source, the service engineer of local agent need a couple weeks to fix up the operation problem with the high frequency spectrum analyzer.
2. Eugene is thinking about the possibility to use the cable with two optical fiber inside, it will reduce the temperature difference influence. He is collecting more information from different sources.
3. Regarding the optical amplifier, Eugene has calculated the system for the photonic LO without optical amplifier according the power level and noise level. Eugene suggests to assembly the EDFA by ourselves instead of purchasing a module from a company

Y.J.Hwang

Y.J.Hwang

Y.J.Hwang

Ongoing

Ongoing

Ongoing

1. Small dish production is proceeding on schedule; it will be delivered by end of May. As to the large dishes, CMA is putting the quote together. Bob will arrange an accuracy measurement on the small dishes.
2. Bob and Paul will have a phone meeting with Vertex by next Monday 4:30P.M. Jeff Kingsley and Bob are working on the platform design.

B.Martin

B.Martin

Ongoing

Ongoing

H.M. Jiang

Ongoing