AMiBA PROJECT WEEKLY MEETING MINUTES

Date: 11.January 2001

Participants: B. Martin, H. Wang, W. Warwick, M.Kesteven, P. Robert, M.T. Chen, H.C. Lu, Y. J. Hwang, W. Ho, P. Shaw, J. Wang, Jean Cheng

Issues and Description	Action by			Output
MMIC
1. Follow up the discussion on the HPF simulation in last meeting, Leo changed the IF frequency to 1~ 20GHz and re-do simulation, he found the internal noise power contributed from image frequency is 42 dB below ¡V55.7dBm when using the original proposed filter. And the internal noise power is almost not changed by the image signal. So he think the original specs should be OK. Leo has made a report on that simulation, he will send it over to Bob, Mal & everyone to take a look. We will discuss it further by next week. 2. As for loaning some modules from JPL, Todd has promised to write a task description report to NASA for approval, Huei will follow up and check with Todd. 3. T.H. & Eugene has measured the Specek¡¦s amplifiers twice in yesterday, the test results almost the same; the major gain is around 3.5dB. Eugene has informed Specek about the result, and got some advice back. Eugene will forward the Specek¡¦s response to Huei & Todd, so they will take a look and probably input some idea. 4. Regarding the mixer chips testing, Huei asks Warwick check it up with Russell about the status. 5. NRAO confirmed that the first 2 units of W-band amplifier should be delivered to us shortly, they just start to make test. 6. No news from TRW about the export license approval for InP HEMT.	H.C. Lu H.Wang T.H. Chu Y.J. Hwang W.Warwick			Next week ongoing ongoing next week
Lag Correlator Hybrid
1. There are some communications back and forth between Paul Robert and Huei's students about the circuit diagram, layout of GaAs HBT. Paul asks Huei provide the foundry design data for his reference, Huei will check it and back to Paul later on. 2. Regarding the InP HBT multipliers, Paul says that he will do packaging testing next week, probably in a week or two he should have the testing result for one of the multiplier in the packaging. 3. Regarding the LTC module fabrication for lag correlator using HBT multipliers, Warwick sorted out all legal problem and non-disclosure agreement with ACX in Taiwan, and now he got a specified engineer he can talk to, so he is under way now. 4. Regarding the 16-element correlator basis on mixer using power divider circuit, Jeff will find out the latest status, and inform us next week. He also will talk to us about what his student has done for the measurement on the MICA broadband mixer basis correlator next week. . .	W. Wilson H.Wang W. Warwick J. Peterson			ongoing Ongoing Next week
Receiver
1. As per request, Mal will provide a temperature sensor board to Mingtang. Paul asks Mal to provide the cost information as well. The commercial board for 8 channels will cost $1000USD each. 2. Regarding the collaboration proposal on the development of NRAO OMT, Bob says that as he knew the pre-production run has been done. John Payne will tell us the update status as well as pricing and time schedule during his visit by next week. 3. Regarding the vacuum window material, Mal agreed to send a sample to Mingtang, Jeff will resent a sample to Mingtang as well. 4. Mal will look at the summary on receiver design, which prepared by Mingtang; he will get back to Mingtang if any thing is needed to clarify. 5. West Ho is working with Mingtang on the receiver layout in detail, and we are aiming to turn out the two prototypes by July.	M. Sinclair B. Martin M. Sinclair J. Peterson M. Sinclair		ongoing ongoing ASAP ASAP
IF/LO
1. Warwick received the technical data of fiber laser system from Eugene; Warwick needs to discuss theidea with the expert in a couple of day, and he will back to Eugene. 2. As to the optical fiber (5 meters long), Yugene got response from Sumitomo in Tokyo, they agree to provide quotation to us. Leo has the information of cable supplier - Andrew, he will forward the Specs or price to Bob.		W. Wilson Y.J. Hwang H.C. Lu		ASAP ASAP ASAP
Platform/Mount/Dishes
1. We got a quotation for the prototype dishes from Composite Mirror, Inc.; Bob will discuss it with Fred Philippe and Paul Monday morning. 2. We also got a proposal from Vertex GmbH about the Design / feasibility study for hexapod mount, a cost comparison vs. conventional mount will be included in this study. Fred has approved it; Vertex will submit a report in March. 3. Jeff Kingsley has generated some drawings for dishes; Bob will bring the file with him to Taipei.		B. Martin B. Martin		ongoing Monday
Work plan
All agreed to renew the work plan for year 2001 and submit it ASAP, this will be the base of project plan year 2001 for Ministry of Education. Warwick will help Paul figure out the budget we need for correlator production in this year.
Annual report
All agreed to submit the Annual report to Jean ASAP. Warwick has submitted an interim report on the prototype lag correlator; Michael has also submitted a report on project system integration.
Visitor
John Payne/Jan. 16~21 ; Darren Emerson / Jan. 16~18 ; Chung-Shang Institute of Science & Technology / Jan. 16
Next Meeting
7:30pm EDT, 8:30am Taiwan, 10:30 Australia, 4:30pm Tucson/Thursday/Jan. 18, 2001 ATTENTION: Chinese New Year Holiday starts from Jan. 21 through 28, and the weekly meeting on Jan.25 will be canceled.