Mei Shen - Academia.edu (original) (raw)
Papers by Mei Shen
CSIRO ICT Centre is developing millimetre wave point-to-point links suitable for multigigabit wir... more CSIRO ICT Centre is developing millimetre wave point-to-point links suitable for multigigabit wireless connectivity. Suitable spectrum for this purpose is allocated at the 60 GHz band and above. This paper reports a new point-to-point link that will be installed at Marsfield site to demonstrate multi-gigabit operation and performance of its key components. The link will operate at the 81-86 GHz band incorporating CSIRO designed millimetre wave MMICs and multi-gigabit modems.
2008 Global Symposium on Millimeter Waves, 2008
70-90 GHz integrated receive and transmit modules with sub-harmonic frequency translation were de... more 70-90 GHz integrated receive and transmit modules with sub-harmonic frequency translation were developed using a GaAs MMIC chip set. These have a reported -3 dB bandwidth above 9 GHz and 6 GHz respectively for the down-converter and up-converter. With a common 39.25 GHz LO frequency, the modules are well suited for the RF transceivers of full-duplex wireless communication systems operating in both 71-76 and 81-86 GHz bands using the lower or upper side-band conversion in each chosen (receive or transmit) direction.
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005., 2005
Introduction Computer speeds continue to increase following Moore's Law. Networking spee... more Introduction Computer speeds continue to increase following Moore's Law. Networking speeds have also been increasing; Gigabit Ethernet is now widely used and 10-Gigabit Ethernet is becoming more available. Wireless data rates have been lagging behind, mainly because of lack of ...
An E-band aperture coupled patch antenna using a combination of GaAs and liquid crystal polymer (... more An E-band aperture coupled patch antenna using a combination of GaAs and liquid crystal polymer (LCP) substrates packaged with a laminated multi-chip module (MCM-L) process is presented in this paper. The antenna offers an electromagnetic interface between a GaAs MMIC and a separate dielectric antenna package. Design, manufacture, packaging and test results of the proposed antenna are presented. Measurement of
Microwave and Optical Technology Letters, 2004
through the straight waveguide with 4-m width are plotted in . Similar single-mode outputs for TE... more through the straight waveguide with 4-m width are plotted in . Similar single-mode outputs for TE and TM polarizations are observed. By using the cutback method, the propagation losses were measured, as listed in . The propagation loss of TM polarization is slightly larger than that of TE polarization. Moreover, waveguides with wider widths have smaller propagation losses.
Microwave and Optical Technology Letters, 2006
their polarization dependence. Our results clearly show the possibility of achieving polarization... more their polarization dependence. Our results clearly show the possibility of achieving polarization-insensitive operation in the presence of stress-induced birefringence and that the polarizationinsensitive condition can be maintained over a wide range of temperature. A temperature sensitivity of Ϫ0.14 nm/°C for the Bragg wavelength was obtained with an epoxy-clad Bragg grating, which is an order of magnitude larger than the value achieved with a fiber Bragg grating or a Bragg grating fabricated on a silica waveguide [12, 13]. Realization of tunable polarization-insensitive filters with Bragg gratings fabricated in simple polymer waveguide structures is promising.
Microwave and Optical Technology Letters, 2004
Microwave and Optical Technology Letters, 2004
tuning resolution was found to be 1 pm, due to the limitation of the OSA and TLS, which exhibited... more tuning resolution was found to be 1 pm, due to the limitation of the OSA and TLS, which exhibited the best resolution of 1 pm. The tuning repeatability was found to be 0.4% over the entire tuning range of 2 nm. The range can be improved by optimizing the package design of the carbon-fiber composite.
IEEE Transactions on Antennas and Propagation, 2000
ABSTRACT A bond-wire-free interconnection between monolithic microwave integrated circuit (MMIC) ... more ABSTRACT A bond-wire-free interconnection between monolithic microwave integrated circuit (MMIC) and antenna using a stacked patch configuration is investigated. An edge-fed patch on a gallium arsenide (GaAs) MMIC chip drives a patch antenna integrated in the lid of the MMIC package. The lid is formed using a liquid crystal polymer (LCP) substrate. The first implementation using a laminated multichip module (MCM-L) process is presented that covers the designated E-band spectrum for long-range wireless communications (71-86 GHz). Electromagnetic simulations and measurements of antenna radiation patterns agree well over the whole frequency range of interest. Important design aspects and manufacturing tolerances specific for the implementation of the interface in MCM-L millimeter-wave front-ends are presented. An alternative design is proposed for improved radiation patterns across the band.
Electronics Letters, 2010
ABSTRACT A stacked patch configuration is used to electromagnetically couple a GaAs MMIC chip to ... more ABSTRACT A stacked patch configuration is used to electromagnetically couple a GaAs MMIC chip to a patch antenna integrated in the lid of the MMIC package. The lid is formed using a liquid crystal polymer substrate. Presented is the first implementation that covers the E-band frequency range from 71-86 GHz for long-range wireless communications. Antenna gain is greater than 8 dBi using a short horn with straight sidewalls.
2014 1st Australian Microwave Symposium (AMS), 2014
CSIRO ICT Centre is developing millimetre wave point-to-point links suitable for multigigabit wir... more CSIRO ICT Centre is developing millimetre wave point-to-point links suitable for multigigabit wireless connectivity. Suitable spectrum for this purpose is allocated at the 60 GHz band and above. This paper reports a new point-to-point link that will be installed at Marsfield site to demonstrate multi-gigabit operation and performance of its key components. The link will operate at the 81-86 GHz band incorporating CSIRO designed millimetre wave MMICs and multi-gigabit modems.
2008 Global Symposium on Millimeter Waves, 2008
70-90 GHz integrated receive and transmit modules with sub-harmonic frequency translation were de... more 70-90 GHz integrated receive and transmit modules with sub-harmonic frequency translation were developed using a GaAs MMIC chip set. These have a reported -3 dB bandwidth above 9 GHz and 6 GHz respectively for the down-converter and up-converter. With a common 39.25 GHz LO frequency, the modules are well suited for the RF transceivers of full-duplex wireless communication systems operating in both 71-76 and 81-86 GHz bands using the lower or upper side-band conversion in each chosen (receive or transmit) direction.
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005., 2005
Introduction Computer speeds continue to increase following Moore's Law. Networking spee... more Introduction Computer speeds continue to increase following Moore's Law. Networking speeds have also been increasing; Gigabit Ethernet is now widely used and 10-Gigabit Ethernet is becoming more available. Wireless data rates have been lagging behind, mainly because of lack of ...
An E-band aperture coupled patch antenna using a combination of GaAs and liquid crystal polymer (... more An E-band aperture coupled patch antenna using a combination of GaAs and liquid crystal polymer (LCP) substrates packaged with a laminated multi-chip module (MCM-L) process is presented in this paper. The antenna offers an electromagnetic interface between a GaAs MMIC and a separate dielectric antenna package. Design, manufacture, packaging and test results of the proposed antenna are presented. Measurement of
Microwave and Optical Technology Letters, 2004
through the straight waveguide with 4-m width are plotted in . Similar single-mode outputs for TE... more through the straight waveguide with 4-m width are plotted in . Similar single-mode outputs for TE and TM polarizations are observed. By using the cutback method, the propagation losses were measured, as listed in . The propagation loss of TM polarization is slightly larger than that of TE polarization. Moreover, waveguides with wider widths have smaller propagation losses.
Microwave and Optical Technology Letters, 2006
their polarization dependence. Our results clearly show the possibility of achieving polarization... more their polarization dependence. Our results clearly show the possibility of achieving polarization-insensitive operation in the presence of stress-induced birefringence and that the polarizationinsensitive condition can be maintained over a wide range of temperature. A temperature sensitivity of Ϫ0.14 nm/°C for the Bragg wavelength was obtained with an epoxy-clad Bragg grating, which is an order of magnitude larger than the value achieved with a fiber Bragg grating or a Bragg grating fabricated on a silica waveguide [12, 13]. Realization of tunable polarization-insensitive filters with Bragg gratings fabricated in simple polymer waveguide structures is promising.
Microwave and Optical Technology Letters, 2004
Microwave and Optical Technology Letters, 2004
tuning resolution was found to be 1 pm, due to the limitation of the OSA and TLS, which exhibited... more tuning resolution was found to be 1 pm, due to the limitation of the OSA and TLS, which exhibited the best resolution of 1 pm. The tuning repeatability was found to be 0.4% over the entire tuning range of 2 nm. The range can be improved by optimizing the package design of the carbon-fiber composite.
IEEE Transactions on Antennas and Propagation, 2000
ABSTRACT A bond-wire-free interconnection between monolithic microwave integrated circuit (MMIC) ... more ABSTRACT A bond-wire-free interconnection between monolithic microwave integrated circuit (MMIC) and antenna using a stacked patch configuration is investigated. An edge-fed patch on a gallium arsenide (GaAs) MMIC chip drives a patch antenna integrated in the lid of the MMIC package. The lid is formed using a liquid crystal polymer (LCP) substrate. The first implementation using a laminated multichip module (MCM-L) process is presented that covers the designated E-band spectrum for long-range wireless communications (71-86 GHz). Electromagnetic simulations and measurements of antenna radiation patterns agree well over the whole frequency range of interest. Important design aspects and manufacturing tolerances specific for the implementation of the interface in MCM-L millimeter-wave front-ends are presented. An alternative design is proposed for improved radiation patterns across the band.
Electronics Letters, 2010
ABSTRACT A stacked patch configuration is used to electromagnetically couple a GaAs MMIC chip to ... more ABSTRACT A stacked patch configuration is used to electromagnetically couple a GaAs MMIC chip to a patch antenna integrated in the lid of the MMIC package. The lid is formed using a liquid crystal polymer substrate. Presented is the first implementation that covers the E-band frequency range from 71-86 GHz for long-range wireless communications. Antenna gain is greater than 8 dBi using a short horn with straight sidewalls.
2014 1st Australian Microwave Symposium (AMS), 2014