AMiBA PROJECT WEEKLY MEETING MINUTES

Date:14 December 2000

Participants: B. Martin, H. Wang, T.H. Chu, W. Warwick, M. Sinclair, B. Sault, M.T. Cheng, Y. J. Hwang, P. Shaw, Jean Cheng

Issues and Description	Action by			Output
MMIC- W- Band InP HEMT LNA
1. Huei, T.H. and Leo met Mal, Russell, Paul and George last week in Sydney. Huei discussed about the update HEMT test result with Paul, and also passed the Sub Harmonic Mixer chips to Russell to test. In the meeting, they also discussed about the wave guide drawing, and go over the Taida Gib Cell HBT multiplier with Paul. Huei asked Paul help us to finalize the multiplier specs according the new design of InP multiplier. Paul is working on that, he will finish it and send it over to Huei today or tomorrow. 2. Leo got the HPF specs from Mal last week in Sydney, he will do some simulation in the lab to verify the difference of specs between Mal and Leo. He will present the simulation result to everyone in next week. 3. Huei have sent two designs for the InP HEMT chip to JPL, and currently one of his students is working on the third design. He will finish it and send it to JPL as well. As to loan some modules from JPL, Todd will write a task description report to NASA for approval today. 4 As for the 0.1um GaAs HEMT, Huei says that they are still working on the error checking, he will check the progress with CIC early next week. .. 5. Regarding the Wave-guide filter, Huei passed a copy of the drawing form AT to Prof. Wu. Wu’s student is doing the simulation in parallel. 6. Regarding the InP MMIC, Mal says that 3 w-band amplifiers has been tested, and the result is quite encourage, but a little bit disappointment about the noise band width. 7. Regarding the Specek's amplifiers, T.H. says that he hopes to receive the stuff in a couple of days. He will test them once received.	H. Wang H.C. Lu H.Wang H.Wang M. Sinclair T.H.Chu			Dec. 14 ongoing ongoing
Lag Correlator Hybrid
1. Regarding the InP HBT multipliers, Warwick says that wafers have not gotten back from TRW yet, and in the mean time Paul has been getting the packaging and test fixture ready. He is also continuing to talk to the ACX in Taiwan about the LTC module for lag correlator using HBT multipliers. 2. Ray asks if he need to design a new LNA/LPF chip? Warwick has discussed this issue with Tzi-Dar, both agree to look at the market if they can find the suitable commercial chips. Currently Ray is looking at it further. 3. Paul talked to CIC person in charge Mr. Wang about the large fabrication of 0.35 micron CMOS for us, his response is quite promising. He think it should be OK to cover our requirement in the fabrication program of 2001, and the price for 15oo ICs is about 2M NTD.	W. Wilson Ray Wei P.Shaw			ongoing Ongoing
Receiver
1. Last week, in Sydney, Leo discussed the layout with Mal, Mal gave him a lot of advises. He will discuss the details with Mingtang after meeting. 2. Regarding the collaboration proposal on the development of NRAO OMT, John is working on pricing and time schedule in details. Bob will follow up this issue with John. 3. Regarding the vacuum window material, Mal provides Mingtang a copy of NRAO Memo of “Quasi-optical vacuum widow/A study on material for a broadband millimeter wave”.	H.C. Lu B. Martin		ASAP ongoing
IF
Last week, in Sydney, T.H. talked with George about the IF equalizer, George gave some advise on the implementation to improve the frequency response of equalizer. So he will modify the circuit layout design accordingly.		T.H. Chu
Platform/Mount/Dishes
1. Bob received a quote for dishes from Composite Mirror Application, Inc., the price is quite attractive. He will meet with Kingsley and iterate the dish design. And then they will meet CMA on Saturday about pricing and how to proceed with getting a contract in place. He and Kinsley will work out preliminary drawings to show the interface between dish and receiver, and send them over to Mingtang and Philippe end this week. 2. Bob asks Michael to take look on the approach to the whole system in terms of number of elements, and the certain way of approach or concept what we are going to do, there is the modularity issue of the correlator and how we are doing the platform and dish, to figure our the optimal number for all of key elements. He also would like ask Warwick to take a look at how strong is the couple, if we cut the cost in the project, and how strong they got the of correlator cost projection going with the end square, and how much is the consequence, how many % in size. Bob really like to draw out some conclusion about where we should go with how many elements, and how we should approach this in budgetary term. In the mean time, Paul will update the cost projection on what we have, and send it over to Warwick and Michael to look at. 3. Regarding the outstanding configuration issue, Bob and Fred will discuss it with the science team today. He will also talk to vertex about the design iteration today as well. Our aim to find out the priority of the science goal, and develop an optimal engineering solution.		B. Martin B. Martin M. Kesteven W. Warwick B. Martin		ongoing Ongoing ongoing
Traveling
Bob/ Dec 22~Dec 28
Next Meeting
7:30pm EDT, 8:30am Taiwan, 10:30 Australia, 4:30pm Tucson/Thursday/Dec.21, 2000
Please note :the meeting on Dec.28 will be cancelled.