AMiBA PROJECT WEEKLY MEETING
MINUTES
Date: 30 November 2000
Participants: B. Martin, W.
Wilson, M. Kesteven, C. H. Lu, Y. J. Hwang, R. Wei, J. Li, P. Shaw, 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 0.15μm 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.….As to
the export license application for the InP HEMT of TRW, Fred wrote a
letter to AIT confirming we will not retransfer
those InP HEMT MMIC wafers without the consent of the U.S. government.
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 everyone by
Dec. 14. 7.
Regarding the InP
MMIC, Mal says that 3 w-band amplifiers has been tested, and the result is
quite encourage. 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,
the local agent confirmed the delivery is on Dec. 8, Leo says.
|
H. Wang M. Sinclair H.Wang H.Wang M. Sinclair H.C. LU M. Sinclair W. Wang T.H. Chu |
ongoing ongoing. ongoing ongoing Dec.14 ASAP 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 polarisation
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. Ray asks if
he need to design a new LNA/LPF chip? Warwick will discuss this issue
further with Tzi-Dar. |
W. Wilson W. Warwick Ray Wei W. Warwick |
ongoing DONE Ongoing ASAP | ||
Receiver | ||||
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. |
B.
Martin |
ASAP | ||
LO/IF | ||||
Yugene says
he did not receive the IF modulator data from John yet, he will send an
email to John.
|
Y.J.
Hwang |
ASAP | ||
Platform/Mount/Dishes |
|
| ||
1.
Bob hopes the Vertex
could provide us a quote for the mount by this
weekend. 2.
Bob wish to set up a
meeting to discuss about the detail design on dishes with Philippe,
Mingtang and Michael shortly. 3.
Bob will get a quote
for dishes from the firm in Tucson calls “Compositive Mirrors
Applications”. 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.
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. 6.
There are some open
issues are required to clarify; where to install the correlators? how much
are their weight and size? Warwick says that he needs some time to figure
them out.
|
B.
Martin B.
Martin B.
Martin B.
Martin M.
Kesteven W.
Warwick |
ongoing ASAP ongoing ongoing DONE | ||
Visitor | ||||
B. Martin/ Nov. 28 ~
Dec. 9
| ||||
Traveling | ||||
Huei, &
Leo/ Dec. 3 ~ 8 |
|
| ||
Next Meeting | ||||
7:30pm EDT,
8:30am Taiwan, 10:30 Australia, 4:30pm Tucson/Thursday/Dec.7.
2000 | ||||