Measurement System for Mm-wave Integrated and Probe-fed Antennas

D. Titz, A. Bisognin, F. Ferrero, C. Luxey, G. Jacquemod, P. Brachat, R. Pilard, F. Gianesello, D. Gloria

Micropositioner for antenna probing
Coaxial and Waveguide connections
Lens mounted on a WiGig module
Organic BGA from STM
Monopole antenna in MEMS process from Microsoft
Released cantilever on Silicon technology
Dedicated foam holder
Broadside, Backside, Endfire radiation pattern measurements
Series fed array with differential feeding
127um Teflon substrate
15 partners - Joint publications
10 Academics – 5 Industrials
IPD flip-chip Patch on TacLumplus substrate
Best paper LAPC 2012
4*4 Butler matrix on glass @ 60GHz
IPD technology
4 elements array with endfire radiation pattern from VTT @ 60GHz
LTCC technology
Grid array from NANYANG Technological University @ 60GHz
LTCC technology
Antenna measurement @ 90GHz with UCSD
Silicon technology and quartz lens
On-wafer measurement
200 mm IPD wafer
Industrial package measurement
Low-cost organic stack-up from STMicroelectronics
Active measurement with IMS and LabSTICC
PA and antenna co-integrated on silicon @ 80GHz
Endfire quasi-yagi antenna @ 120 GHz
IPD technology

The measurement of the radiation and matching performance of millimeter-wave antennas is a very challenging topic. As a single antenna usually has a size of a few square millimeters, the feeding scheme can’t be as simple as a connector, especially if high measurement accuracy is needed. That’s why a microelectronic probe-feeding technique is a possible improvement. However, the final choice depends on the antenna technology, and also on the way the antenna is integrated. Antennas integrated into ceramics or low-cost organic packages are today the most popular antenna-solutions.
The measurement setup we present has been developed from a classical microelectronic probing system but has been mechanically modified to operate in almost a metal-free environment, especially around the antenna under test (AUT). It is then possible to measure the gain of linearly and circularly polarized radiators in several cut planes with a computed accuracy of ±0.8 dB until 140 GHz. It is also possible to measure the radiated field over a quasi-three-dimensional sphere, the microelectronic probe being the only object blocking the electromagnetic waves transmitted by the AUT. Therefore, several methods have been implemented to be able to compute the axial ratio, and the total and radiation efficiencies from these radiation measurements. Thanks to this study, 14 journals and 31 conferences were published. 15 collaborations with prestigious University and Industrials were initiated.

List of Publications

LAPC 2012 Keynote video

(IET website)

The authors would like to thank the CIMPACA design platform and the CREMANT for their support.
STMicroelectronics Tours and Crolles is acknowledged for technical support.