AMiBA PROJECT WEEKLY MEETING MINUTES

Date: 23 November 2000

Participants: K.Y.Lo, H. Wang, W. Wilson, M. Sinclair, M. Kesteven, C. H. Lu, Y. J. Hwang, R. Pelleau, J. Li, P. Shaw, J. Wang, Jean Cheng

Issues and Description	Action by			Output
MMIC- W- Band InP HEMT LNA
1. Huei, T.H. & Leo will visit Sydney, and participate the APM Conference from Dec.3 through Dec.8. Huei will bring the Sub Hamonic Mixer chip of 0.15£gm GaAs PHEMT with him while he visit Sydney. He will organize a meeting with Mal in advance, so he can hand over that chip to ATNF people; rather Russell or Mal, and discuss relevant design and measurement issues with them. The target date to finish all measurements on those chips by late Dec, which including the chip already in ATNF. 2. Todd told Huei that the delivery for InP HEMT chip would be delay for two weeks. Huei thinks they may have time to make another design, his student in working on this. Huei will check this with Todd before leaving for Sydney. 3. As for the 0.1um GaAs HEMT, Huei says that they received some errors back, and now they are fixing on that. 4.¡K. As to the export license application for the InP HEMT of TRW, Paul wrote an official letter in response to the Letter of The Coordination Council for North American Affairs Headquarters explaining why we need to buy those components. Last Friday, CCNAA sent us a copy of letter, which they reply to AIT. Fred will contact the responsible person in AIT to find out how do they deal with our case. 5. Regarding the Wave-guide filter, George Grace will finish a drawing and send to Huei today, Mal says. 6. Leo will prepare a specification for HPF; in the mean time he will make a simulation on that design. The target date to present that simulation result to every by Dec. 14. 7. Regarding the InP MMIC, Mal says that 3 w-band amplifiers have been tested, and the result is quite encouraged. Huei would like to read the testing data, and discuss with Mal or Russell in details, and even to take a look at the chip packaging in the fixture. Mal and Huei will organize a meeting in Sydney by email later on. 8. Regarding the Specek's amplifiers, Prof. Chu has given the green light for shipment to Specek. Now we are waiting for the shipping date confirmation from Specek. 9. Regarding the NRAO amplifier, Leo got confirmation back from NRAO engineer on the input & out put ports orientation. He will discuss with Mingtang, and use this information to work out a detail layout design for receiver.	H. Wang M. Sinclair H.Wang H.Wang P. Shaw K.Y. Lo M. Sinclair H.C. LU M. Sinclair W. Wang T.H. Chu H.C.Lu			ongoing ongoing. ongoing ASAP today Dec.14 ASAP ongoing ongoing
Lag Correlator Hybrid
1. Regarding the InP HBT multipliers, Warwick says that there are two wafers will be sent back from TRW tomorrow, and hopefully he could receive the wafers around the Christmas time. So after that they will start packaging, and doing more testing on it 2. As to the costing on correlator, Warwick assumes that as for the 21 antennas, 4 polarization products per baseline, the bottom line is $1.2M USD, adding the Fibre Optic IF Distribution and Delays Lines to the system will add an estimated $835,000USD. For details, Warwick will make a summary, and send over to Paul. 3. Ray says that he just finish the chip design, and send it to CIC this Monday, so he expects to receive the chip back by Feb.19. And he hopes that chip is able to work on 5 volts, since the original design of the 3.5-micron CMOS is working on 3.3 volts. 4. Paul received a cost projection on the correlator backend output processing IC from Prof. Chiueh; he will forward it to Warwick and Bob to take a look.	W. Wilson W. Warwick Ray Wei P. Shaw			ongoing Ongoing ASAP
Receiver
Regarding the collaboration proposal on the development of NRAO OMT, John is working on pricing and time schedule in details.	M.T.Chen J. Payne		ongoing
LO/IF
Yugene says that in the Japanese LMSA project, they use a different way for the delay line module. They insert the optical phase modulator in the mixer laser branch right after the optical divider. He will send a copy of those diagrams to everyone to take a look. He did not receive any IF modulator data from John yet.		Y.J. Hwang		ASAP
Platform/Mount/Dishes
1. As to the feed leg supporting structure for dishes, Michael will send some information to us. 2. Philippe has contacted the firm in Germany ¡V MAN, and asking quote for dishes, but up to now no response. Michael will help us to find out other source. Philippe says that if we can make the molds in Taiwan, it may reduce cost. . 3. Bob will get a quote for dishes from the firm in Tucson calls ¡§Positive Mirrors¡¨. They actually did the dish for SMT, and also did the secondary mirror for CBI. The price is around $1,000USD per square meter. 4. Positive Mirrors will give a quote for platform by next week as well, Bob says. 5. Bob starts working together with Jeff Kingsley, picking out the two different designs; the three axes traditional one and the hexapod one. Trying to get more details on the prices as they know, and put it together in a week or two. And then we will have a better idea about our cost. 6. Michael will help us to find out an alternative source other than the Vertex to design and to build the prototype mount. Michael will get a quote from a firm in Sydney by the end of this week.		M.Kesteven B. Martin M. Kesteven B. Martin B. Martin B. Martin M. Kesteven		DONE DONE Next week Next week 1~2 weeks End this week
Visitor
M.Kesteven/ Nov. 28 ~ Dec. 3; B. Martin/ Nov. 28 ~ Dec. 9
Traveling
Huei, & Leo/ Dec. 3 ~ 8; T.H. Chu/ Dec.3~6
Next Meeting
7:30pm EDT, 8:30am Taiwan, 10:30 Australia, 4:30pm Tucson/Thursday/Nov. 30. 2000