G. Delisle - Academia.edu (original) (raw)
Papers by G. Delisle
2011 IEEE International Symposium on Antennas and Propagation (APSURSI), 2011
Abstract In this paper, a simple and compact 60 GHz CPW-fed planar monopole antenna for Switched-... more Abstract In this paper, a simple and compact 60 GHz CPW-fed planar monopole antenna for Switched-beam antenna array applications is presented and investigated. The proposed antenna with a small size of 600 µm× 300 µm is composed of a rectangular strip radiation ...
2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488), 2000
Adaptive antenna array systems have been shown to play a central role in removing narrowband mult... more Adaptive antenna array systems have been shown to play a central role in removing narrowband multiple-access interference (MAI) in wireless communications. However, due to the actual need for increasing channel capacity, the required bandwidth is becoming wider and can bring significant deterioration to narrowband adaptive systems. These performance degradations are mainly caused by the fact that the inter-element phase shift
38th IEEE Vehicular Technology Conference, 1988
ABSTRACT
1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192), 1998
ABSTRACT
Canadian Journal of Electrical and Computer Engineering, 1992
ABSTRACT
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005., 2005
ABSTRACT This paper investigates the capacity behavior in an aeronautical MIMO link between a ter... more ABSTRACT This paper investigates the capacity behavior in an aeronautical MIMO link between a terrestrial transmitting station and an airborne station. The channel model is small-area and considers only the scattering function. For this purpose, two different scenarios are simulated and analyzed. In the first one, only reflected scattered paths are considered and the second scenario adds a line of sight (LOS) component. The channel effect on the capacity and the capacity variation due to antenna rotation during flight are the main topics investigated. To enhance the channel capacity, the direct paths must be decorrelated by either a space-time coding or by polarization diversity.
Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341), 1998
ABSTRACT The paper presents the RF and IF architecture of a wireless transceiver. To simplify the... more ABSTRACT The paper presents the RF and IF architecture of a wireless transceiver. To simplify the modulation and demodulation processes a DPSK modulation scheme has been chosen. The demodulation is done from the IF frequency of 280 MHz. The paper presents the signal propagation analysis as well as the hardware implementations of several key components. Among these, we note the unbalanced to balanced circuitry, phase locked loops, IF filtering and grounding/supply network. Experimental results are also discussed
internal as well as external sources. In this paper, a generalization of these results will be ma... more internal as well as external sources. In this paper, a generalization of these results will be made and it will be used to compare the performance, with respect to signal and noise, of two receiving systems: one is the optimized system, in which the array antenna signals are properly combined to yield the maximum SNR at the receiver output; the other is a reference system consisting of a single element of the array, with its matching network, feeding the same receiver. The purpose of the comparison is tc determine quantitatively hov much improvement, if any, czn be gained by using an array of antennas for reception rather than a single element. Formulation Fig. 1 is a schematic representation of an array antenna receiving system showing the individual antennas of the array, with their matching network (PQ), connected to a combiner which, inturn, feeds the receiver. The combiner is an NxN matrix network in which the antema signais are weighted and added vectorially into 2 single outp...
This paper introduces a new way of building a cross-slot coupling patch antenna to generate dual ... more This paper introduces a new way of building a cross-slot coupling patch antenna to generate dual polarization with a CPW feed line on a single layer for the EHF band around a center frequency of 38 GHz. The antenna structure developed combines the advantages of a CPW (coplanar waveguide) with the advantages of an aperture-coupled microstrip antenna, and simplifies the structure of the antenna by reducing the number of the metallization level, from 3 down to 2, thereby making easier the integration of the active devices. In addition, this type of coupling is advantageous when applied to millimeter wave monolithic phased arrays. A unique feed design eliminates the competition for surface space between the antenna elements and the feed network. In addition, the ground plane shields the antenna half-space from spurious radiation emitted by feed lines and active devices. The antenna is designed on a high dielectric constant substrate (εr=9.9), which is close to the dielectric constant of...
Journal of Electromagnetic Waves and Applications, 1996
ABSTRACT
IEEE Transactions on Antennas and Propagation - IEEE TRANS ANTENNAS PROPAGAT, 1981
ABSTRACT
IEEE Transactions on Electromagnetic Compatibility, 2000
ABSTRACT
IEEE Transactions on Antennas and Propagation, 1998
This paper presents the design and experimental results of a coplanar waveguide (CPW) aperture-co... more This paper presents the design and experimental results of a coplanar waveguide (CPW) aperture-coupled patch antenna for the extremely high frequency (EHF) band around a center frequency of 37 GHz. The antenna is implemented on a high dielectric constant substrate ("r = 9:9), which is close to the dielectric constant of GaAs and demonstrates the feasibility of integration of such an antenna structure into monolithic circuits. The major advantage of this configuration is that the reverse side of the antenna can be used for the active and feed components. The antenna structure combines the advantages of CPW with the those of the aperture-coupled microstrip antenna and simplifies the structure of the antenna by reducing the number of metallization level, from three down to two. In addition, this type of coupling is advantageous when applied to millimeter-wave monolithic phased arrays. A unique feed design eliminates the competition for surface space between the antenna elements and the feed network. In addition, the ground plane shields the antenna half-space from spurious radiation emitted by feed lines and active devices. Finally, aperture coupling avoids problems associated with probe feeds at millimeter-wave frequencies, such as complexity of construction and large probe self reactances. This new type of antenna opens the ways to a large number of a new possibilities such as active antennas for millimeter-wave personal communications using monolithic microwave integrated circuits (MMIC's) on the same substrate and a combination of optical and radio transmission.
Antennas and Wireless Propagation Letters, 2000
ABSTRACT In this letter, a new antenna capable of radiolocating and tracking ultrafast targets is... more ABSTRACT In this letter, a new antenna capable of radiolocating and tracking ultrafast targets is presented. Based on an electromagnetic crystal structure, the proposed antenna uses only one radiating element, and beam scanning is achieved by varying the frequency of the excitation signal. Thus, by exciting the antenna with a wideband signal, different patterns will be deployed simultaneously allowing the space covered by the antenna to be scanned instantaneously. This property makes the proposed antenna ideal to radiolocate ultrafast targets that cannot be tracked by the traditional phased antenna arrays. Moreover, the proposed radiolocation process has strong immunity against signal amplitude variations, which makes the new antenna suitable to operate in hostile environments. To present the developed approach, both theoretical study and numerical simulations using the finite-difference time-domain (FDTD) method are given. To validate the developed approach, experimental measurements are also presented and discussed.
2011 IEEE International Symposium on Antennas and Propagation (APSURSI), 2011
Abstract In this paper, a simple and compact 60 GHz CPW-fed planar monopole antenna for Switched-... more Abstract In this paper, a simple and compact 60 GHz CPW-fed planar monopole antenna for Switched-beam antenna array applications is presented and investigated. The proposed antenna with a small size of 600 µm× 300 µm is composed of a rectangular strip radiation ...
2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488), 2000
Adaptive antenna array systems have been shown to play a central role in removing narrowband mult... more Adaptive antenna array systems have been shown to play a central role in removing narrowband multiple-access interference (MAI) in wireless communications. However, due to the actual need for increasing channel capacity, the required bandwidth is becoming wider and can bring significant deterioration to narrowband adaptive systems. These performance degradations are mainly caused by the fact that the inter-element phase shift
38th IEEE Vehicular Technology Conference, 1988
ABSTRACT
1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192), 1998
ABSTRACT
Canadian Journal of Electrical and Computer Engineering, 1992
ABSTRACT
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005., 2005
ABSTRACT This paper investigates the capacity behavior in an aeronautical MIMO link between a ter... more ABSTRACT This paper investigates the capacity behavior in an aeronautical MIMO link between a terrestrial transmitting station and an airborne station. The channel model is small-area and considers only the scattering function. For this purpose, two different scenarios are simulated and analyzed. In the first one, only reflected scattered paths are considered and the second scenario adds a line of sight (LOS) component. The channel effect on the capacity and the capacity variation due to antenna rotation during flight are the main topics investigated. To enhance the channel capacity, the direct paths must be decorrelated by either a space-time coding or by polarization diversity.
Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341), 1998
ABSTRACT The paper presents the RF and IF architecture of a wireless transceiver. To simplify the... more ABSTRACT The paper presents the RF and IF architecture of a wireless transceiver. To simplify the modulation and demodulation processes a DPSK modulation scheme has been chosen. The demodulation is done from the IF frequency of 280 MHz. The paper presents the signal propagation analysis as well as the hardware implementations of several key components. Among these, we note the unbalanced to balanced circuitry, phase locked loops, IF filtering and grounding/supply network. Experimental results are also discussed
internal as well as external sources. In this paper, a generalization of these results will be ma... more internal as well as external sources. In this paper, a generalization of these results will be made and it will be used to compare the performance, with respect to signal and noise, of two receiving systems: one is the optimized system, in which the array antenna signals are properly combined to yield the maximum SNR at the receiver output; the other is a reference system consisting of a single element of the array, with its matching network, feeding the same receiver. The purpose of the comparison is tc determine quantitatively hov much improvement, if any, czn be gained by using an array of antennas for reception rather than a single element. Formulation Fig. 1 is a schematic representation of an array antenna receiving system showing the individual antennas of the array, with their matching network (PQ), connected to a combiner which, inturn, feeds the receiver. The combiner is an NxN matrix network in which the antema signais are weighted and added vectorially into 2 single outp...
This paper introduces a new way of building a cross-slot coupling patch antenna to generate dual ... more This paper introduces a new way of building a cross-slot coupling patch antenna to generate dual polarization with a CPW feed line on a single layer for the EHF band around a center frequency of 38 GHz. The antenna structure developed combines the advantages of a CPW (coplanar waveguide) with the advantages of an aperture-coupled microstrip antenna, and simplifies the structure of the antenna by reducing the number of the metallization level, from 3 down to 2, thereby making easier the integration of the active devices. In addition, this type of coupling is advantageous when applied to millimeter wave monolithic phased arrays. A unique feed design eliminates the competition for surface space between the antenna elements and the feed network. In addition, the ground plane shields the antenna half-space from spurious radiation emitted by feed lines and active devices. The antenna is designed on a high dielectric constant substrate (εr=9.9), which is close to the dielectric constant of...
Journal of Electromagnetic Waves and Applications, 1996
ABSTRACT
IEEE Transactions on Antennas and Propagation - IEEE TRANS ANTENNAS PROPAGAT, 1981
ABSTRACT
IEEE Transactions on Electromagnetic Compatibility, 2000
ABSTRACT
IEEE Transactions on Antennas and Propagation, 1998
This paper presents the design and experimental results of a coplanar waveguide (CPW) aperture-co... more This paper presents the design and experimental results of a coplanar waveguide (CPW) aperture-coupled patch antenna for the extremely high frequency (EHF) band around a center frequency of 37 GHz. The antenna is implemented on a high dielectric constant substrate ("r = 9:9), which is close to the dielectric constant of GaAs and demonstrates the feasibility of integration of such an antenna structure into monolithic circuits. The major advantage of this configuration is that the reverse side of the antenna can be used for the active and feed components. The antenna structure combines the advantages of CPW with the those of the aperture-coupled microstrip antenna and simplifies the structure of the antenna by reducing the number of metallization level, from three down to two. In addition, this type of coupling is advantageous when applied to millimeter-wave monolithic phased arrays. A unique feed design eliminates the competition for surface space between the antenna elements and the feed network. In addition, the ground plane shields the antenna half-space from spurious radiation emitted by feed lines and active devices. Finally, aperture coupling avoids problems associated with probe feeds at millimeter-wave frequencies, such as complexity of construction and large probe self reactances. This new type of antenna opens the ways to a large number of a new possibilities such as active antennas for millimeter-wave personal communications using monolithic microwave integrated circuits (MMIC's) on the same substrate and a combination of optical and radio transmission.
Antennas and Wireless Propagation Letters, 2000
ABSTRACT In this letter, a new antenna capable of radiolocating and tracking ultrafast targets is... more ABSTRACT In this letter, a new antenna capable of radiolocating and tracking ultrafast targets is presented. Based on an electromagnetic crystal structure, the proposed antenna uses only one radiating element, and beam scanning is achieved by varying the frequency of the excitation signal. Thus, by exciting the antenna with a wideband signal, different patterns will be deployed simultaneously allowing the space covered by the antenna to be scanned instantaneously. This property makes the proposed antenna ideal to radiolocate ultrafast targets that cannot be tracked by the traditional phased antenna arrays. Moreover, the proposed radiolocation process has strong immunity against signal amplitude variations, which makes the new antenna suitable to operate in hostile environments. To present the developed approach, both theoretical study and numerical simulations using the finite-difference time-domain (FDTD) method are given. To validate the developed approach, experimental measurements are also presented and discussed.