Manos Tentzeris | Georgia Institute of Technology (original) (raw)
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Papers by Manos Tentzeris
A novel remote localization system utilizing renewable solar energy to power and trigger communic... more A novel remote localization system utilizing renewable solar energy to power and trigger communication between end devices and a wireless network is presented. The novelty of the system is the unique node design that allows for battery less operation using ambient solar energy. Hardware and software design considerations involved in making the localization system operational inspite of the limitations of solar power are outlined. The final functioning localization system results as an end application are presented. A remote localization system with very good accuracy utilizing this end node communicating with a WSN is showcased as an end application with tremendous potential.
In this paper, the dual-band retrodirective reflector array using Substrate Integrated Waveguide ... more In this paper, the dual-band retrodirective reflector array using Substrate Integrated Waveguide (SIW) and inkjetprinted technologies on paper, for operability around 3.6 GHz and 5.8 GHz is proposed. It offers the versatility of multi-band retrodirective designs potentially covering numerous RFID interrogation, sensing and communication bands. I.
2009 IEEE Antennas and Propagation Society International Symposium, 2009
Proceedings of 2014 3rd Asia-Pacific Conference on Antennas and Propagation, 2014
The modeling of packaged modules that involve irregular metal shapes and lossy, dispersive materi... more The modeling of packaged modules that involve irregular metal shapes and lossy, dispersive materials requires design algorithms that combine the computational efficiency with the numerical accuracy over wide frequency bands. This paper presents the formulation of a hybrid FDTD method integrating a quasi-static subgridding algorithm and employing digital predictors. Three techniques of DSP-based digital predictors are used to calculate the
This chapter contains sections titled: Introduction Fundamental Considerations Link Budget Analys... more This chapter contains sections titled: Introduction Fundamental Considerations Link Budget Analysis Propagation Effects Interface Planning Superheterodyne Architecture Low IF Architecture Direct Conversion Architecture Two-Stage Direct Conversion Current-Mode Architecture Subsampling Architecture Multiband Direct Conversion Radio Polar Modulator Harmonic Reject Architecture Practical Considerations for Transceiver Integration Conclusion References IntroductionFundamental ConsiderationsLink Budget AnalysisPropagation EffectsInterface PlanningSuperheterodyne ArchitectureLow IF ArchitectureDirect Conversion ArchitectureTwo-Stage Direct ConversionCurrent-Mode ArchitectureSubsampling ArchitectureMultiband Direct Conversion RadioPolar ModulatorHarmonic Reject ArchitecturePractical Considerations for Transceiver IntegrationConclusionReferences
2003 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, 2003. Digest of Papers., 2000
ABSTRACT
Digest of Papers. 2004 Topical Meeting onSilicon Monolithic Integrated Circuits in RF Systems, 2004., 2000
The simulated results of a silicon-based microstrip patch antenna are presented. The antenna stru... more The simulated results of a silicon-based microstrip patch antenna are presented. The antenna structure includes an additional layer of low permittivity material sandwiched between the antenna and the silicon substrate. The simulations are performed using two in-house computer codes that make use of the multi-resolution time domain (MRTD) and the finite difference time domain (FDTD) methods to solve for the electromagnetic fields. These techniques will be used for the modeling and optimization of various silicon-based antennas.
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157), 2000
This paper introduces a novel full wave technique for modeling MEMS tunable capacitors that is ba... more This paper introduces a novel full wave technique for modeling MEMS tunable capacitors that is based on the coupling of physical motion of the MEMS device with Maxwell's equations through the modification of the MRTD/FDTD techniques.
IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2000
2005 IEEE Antennas and Propagation Society International Symposium, 2000
In this paper, it is demonstrated that a uniform traveling-wave current distribution on a circula... more In this paper, it is demonstrated that a uniform traveling-wave current distribution on a circular loop of one-wavelength circumference can be obtained by loading the loop with a lumped reactance at a position of 45° away from the feed point. To achieve a uniform traveling-wave current distribution, the loading reactance and the input impedances of the loaded and unloaded loop antennas need to satisfy certain relations from which the loading reactance can be predicted theoretically. It is shown that the circular loop antenna with uniform traveling-wave current distribution results in a lower profile, a more symmetrical circularly polarized radiation pattern, and a much better input impedance matching. .
2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535), 2000
ABSTRACT
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017), 2000
ABSTRACT
ABSTRACT An experimental investigation on the inkjet-printed power harvester for 2.4GHz is presen... more ABSTRACT An experimental investigation on the inkjet-printed power harvester for 2.4GHz is presented in this paper. An one stage discrete rectifier based on a voltage doubler structure and a planar monopole antenna are fabricated on cardboard using inkjet-printing technology. Eventually, the performance of the whole system is examined by measuring the output voltage of the RF power harvester. By the utilization of the proposed idea, the fabrication of low-cost environmentally-friendly battery-less wireless modules is conceivable.
IEEE Antennas and Wireless Propagation Letters, 2015
ABSTRACT We present a fully inkjet-printed novel wideband planar monopole antenna on thin packagi... more ABSTRACT We present a fully inkjet-printed novel wideband planar monopole antenna on thin packaging cardboard available in bulk for low-cost and environmentally-friendly mass manufacturing. We outline the characterization and the dielectric properties of the cardboard which are imperative for the successful design of an antenna on a paper-based substrate. To achieve highly conductive inkjet-printed pattern on the fibrous and porous cardboard, we deposit thin dielectric coating on the cardboard in the same inkjet process. The operation of the antenna is attested through simulations and measurements in the frequency range of 600-1500 MHz, where there are several strong radio signals present for ambient RF energy harvesting.
IEEE MTT-S International Microwave Symposium Digest, 2005., 2000
A broadband elevated microstrip coupler has been designed and implemented on the soda-lime glass ... more A broadband elevated microstrip coupler has been designed and implemented on the soda-lime glass with surface micromachining technology. The coupler is elevated by 200 µm and fed by a combination of epoxy-core metal post and coplanar waveguide, which helps eliminate the conventional air/dielectric interface problems. By this method, frequency dispersion and attenuation due to the substrate can be effectively reduced. A 10 dB return loss and a 12.5 dB coupling is measured in our experiment over 15-45 GHz. The proposed structure can be implemented on very lossy substrates, such as standard CMOS substrate and thus can be applied into the integration of high performance RF components with digital or optical functions/subsystems on low-cost low-resistivity silicon wafers.
2005 IEEE Antennas and Propagation Society International Symposium, 2000
In this paper, an air-filled elevated microstrip antenna resonating at 25 GHz based on surface mi... more In this paper, an air-filled elevated microstrip antenna resonating at 25 GHz based on surface micromachining technology is fabricated and characterized for the first time. The antenna is air-lifted on high-ε r soda-lime glass substrate and demonstrates a 7% 10 dB bandwidth in measurement. A 10.2 dBi directivity and a nearly frequency-independent broadside radiation pattern over a range of 7 GHz around the center frequency are projected in simulation and currently are experimentally investigated. The elevated patch is fed by a vertical epoxy-core metal-coated micromachined probe and supported by several epoxy posts underneath. By the unique feeding technique we have developed in this paper, the dielectric filled between the patch and the ground is air only and the requirement of low-ε r substrate for patch antennas and high-ε r substrate for compact feeding network can be satisfied simultaneously. The performance degradation for traditional microstrip antenna directly built on high-ε r substrate is alleviated a lot due to the elimination of surface waves in the substrate.
2005 IEEE Antennas and Propagation Society International Symposium, 2000
A low-cost wideband short backfire antenna (SBA) and a circularly polarized (CP) SBA are presente... more A low-cost wideband short backfire antenna (SBA) and a circularly polarized (CP) SBA are presented. The low-cost SBA designed at the 5 GHz UNII band is excited by a planar monopole which is printed on a dielectric substrate and fed by a microstrip line. By splitting the printed monopole with a slot, a wideband performance is achieved. It is demonstrated that the low-cost SBA can achieve an impedance bandwidth of 15% (VSWR<2). The CP SBA is excited by a cross aperture with an unbalanced feed that consists of two orthogonal H-shaped slots with a pair of capacitive stubs. It is shown that the CP SBA can achieve an axial ratio (≤3 dB) bandwidth of 4.2% with a VSWR bandwidth of 6.5 % (VSWR<1.2) and a gain of 14 dBi. As highgain and low-cost wideband/CP directional antennas, the new SBAs can find applications in various wireless communications systems (such as LMDS, WLAN, and the emerging WiMAX networks) and wireless power transmission.
2005 IEEE Antennas and Propagation Society International Symposium, 2000
A vertical W-band surface-micromachined Yagi-Uda monopole array is proposed and implemented for t... more A vertical W-band surface-micromachined Yagi-Uda monopole array is proposed and implemented for the first time. The monopoles stand on a high-k soda-lime glass substrate and are fed by a coplanar waveguide. The geometry functions as a vertically placed Yagi-Uda antenna due to the image theory. The performance of the vertical Yagi-Uda is to be superior to conventional W-band printed antennas due to minimum substrate wave effects. A successful implementation of the vertical Yagi-Uda structure is demonstrated using high-aspect-ratio surface micromachining fabrication technologies. The test results of a 5 element structure demonstrate a 10-dBimpedance-bandwidth of 12% at 100 GHz. A directivity of 8.2 dBi is projected for this prototype.
A novel remote localization system utilizing renewable solar energy to power and trigger communic... more A novel remote localization system utilizing renewable solar energy to power and trigger communication between end devices and a wireless network is presented. The novelty of the system is the unique node design that allows for battery less operation using ambient solar energy. Hardware and software design considerations involved in making the localization system operational inspite of the limitations of solar power are outlined. The final functioning localization system results as an end application are presented. A remote localization system with very good accuracy utilizing this end node communicating with a WSN is showcased as an end application with tremendous potential.
In this paper, the dual-band retrodirective reflector array using Substrate Integrated Waveguide ... more In this paper, the dual-band retrodirective reflector array using Substrate Integrated Waveguide (SIW) and inkjetprinted technologies on paper, for operability around 3.6 GHz and 5.8 GHz is proposed. It offers the versatility of multi-band retrodirective designs potentially covering numerous RFID interrogation, sensing and communication bands. I.
2009 IEEE Antennas and Propagation Society International Symposium, 2009
Proceedings of 2014 3rd Asia-Pacific Conference on Antennas and Propagation, 2014
The modeling of packaged modules that involve irregular metal shapes and lossy, dispersive materi... more The modeling of packaged modules that involve irregular metal shapes and lossy, dispersive materials requires design algorithms that combine the computational efficiency with the numerical accuracy over wide frequency bands. This paper presents the formulation of a hybrid FDTD method integrating a quasi-static subgridding algorithm and employing digital predictors. Three techniques of DSP-based digital predictors are used to calculate the
This chapter contains sections titled: Introduction Fundamental Considerations Link Budget Analys... more This chapter contains sections titled: Introduction Fundamental Considerations Link Budget Analysis Propagation Effects Interface Planning Superheterodyne Architecture Low IF Architecture Direct Conversion Architecture Two-Stage Direct Conversion Current-Mode Architecture Subsampling Architecture Multiband Direct Conversion Radio Polar Modulator Harmonic Reject Architecture Practical Considerations for Transceiver Integration Conclusion References IntroductionFundamental ConsiderationsLink Budget AnalysisPropagation EffectsInterface PlanningSuperheterodyne ArchitectureLow IF ArchitectureDirect Conversion ArchitectureTwo-Stage Direct ConversionCurrent-Mode ArchitectureSubsampling ArchitectureMultiband Direct Conversion RadioPolar ModulatorHarmonic Reject ArchitecturePractical Considerations for Transceiver IntegrationConclusionReferences
2003 Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, 2003. Digest of Papers., 2000
ABSTRACT
Digest of Papers. 2004 Topical Meeting onSilicon Monolithic Integrated Circuits in RF Systems, 2004., 2000
The simulated results of a silicon-based microstrip patch antenna are presented. The antenna stru... more The simulated results of a silicon-based microstrip patch antenna are presented. The antenna structure includes an additional layer of low permittivity material sandwiched between the antenna and the silicon substrate. The simulations are performed using two in-house computer codes that make use of the multi-resolution time domain (MRTD) and the finite difference time domain (FDTD) methods to solve for the electromagnetic fields. These techniques will be used for the modeling and optimization of various silicon-based antennas.
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157), 2000
This paper introduces a novel full wave technique for modeling MEMS tunable capacitors that is ba... more This paper introduces a novel full wave technique for modeling MEMS tunable capacitors that is based on the coupling of physical motion of the MEMS device with Maxwell's equations through the modification of the MRTD/FDTD techniques.
IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2000
2005 IEEE Antennas and Propagation Society International Symposium, 2000
In this paper, it is demonstrated that a uniform traveling-wave current distribution on a circula... more In this paper, it is demonstrated that a uniform traveling-wave current distribution on a circular loop of one-wavelength circumference can be obtained by loading the loop with a lumped reactance at a position of 45° away from the feed point. To achieve a uniform traveling-wave current distribution, the loading reactance and the input impedances of the loaded and unloaded loop antennas need to satisfy certain relations from which the loading reactance can be predicted theoretically. It is shown that the circular loop antenna with uniform traveling-wave current distribution results in a lower profile, a more symmetrical circularly polarized radiation pattern, and a much better input impedance matching. .
2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535), 2000
ABSTRACT
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017), 2000
ABSTRACT
ABSTRACT An experimental investigation on the inkjet-printed power harvester for 2.4GHz is presen... more ABSTRACT An experimental investigation on the inkjet-printed power harvester for 2.4GHz is presented in this paper. An one stage discrete rectifier based on a voltage doubler structure and a planar monopole antenna are fabricated on cardboard using inkjet-printing technology. Eventually, the performance of the whole system is examined by measuring the output voltage of the RF power harvester. By the utilization of the proposed idea, the fabrication of low-cost environmentally-friendly battery-less wireless modules is conceivable.
IEEE Antennas and Wireless Propagation Letters, 2015
ABSTRACT We present a fully inkjet-printed novel wideband planar monopole antenna on thin packagi... more ABSTRACT We present a fully inkjet-printed novel wideband planar monopole antenna on thin packaging cardboard available in bulk for low-cost and environmentally-friendly mass manufacturing. We outline the characterization and the dielectric properties of the cardboard which are imperative for the successful design of an antenna on a paper-based substrate. To achieve highly conductive inkjet-printed pattern on the fibrous and porous cardboard, we deposit thin dielectric coating on the cardboard in the same inkjet process. The operation of the antenna is attested through simulations and measurements in the frequency range of 600-1500 MHz, where there are several strong radio signals present for ambient RF energy harvesting.
IEEE MTT-S International Microwave Symposium Digest, 2005., 2000
A broadband elevated microstrip coupler has been designed and implemented on the soda-lime glass ... more A broadband elevated microstrip coupler has been designed and implemented on the soda-lime glass with surface micromachining technology. The coupler is elevated by 200 µm and fed by a combination of epoxy-core metal post and coplanar waveguide, which helps eliminate the conventional air/dielectric interface problems. By this method, frequency dispersion and attenuation due to the substrate can be effectively reduced. A 10 dB return loss and a 12.5 dB coupling is measured in our experiment over 15-45 GHz. The proposed structure can be implemented on very lossy substrates, such as standard CMOS substrate and thus can be applied into the integration of high performance RF components with digital or optical functions/subsystems on low-cost low-resistivity silicon wafers.
2005 IEEE Antennas and Propagation Society International Symposium, 2000
In this paper, an air-filled elevated microstrip antenna resonating at 25 GHz based on surface mi... more In this paper, an air-filled elevated microstrip antenna resonating at 25 GHz based on surface micromachining technology is fabricated and characterized for the first time. The antenna is air-lifted on high-ε r soda-lime glass substrate and demonstrates a 7% 10 dB bandwidth in measurement. A 10.2 dBi directivity and a nearly frequency-independent broadside radiation pattern over a range of 7 GHz around the center frequency are projected in simulation and currently are experimentally investigated. The elevated patch is fed by a vertical epoxy-core metal-coated micromachined probe and supported by several epoxy posts underneath. By the unique feeding technique we have developed in this paper, the dielectric filled between the patch and the ground is air only and the requirement of low-ε r substrate for patch antennas and high-ε r substrate for compact feeding network can be satisfied simultaneously. The performance degradation for traditional microstrip antenna directly built on high-ε r substrate is alleviated a lot due to the elimination of surface waves in the substrate.
2005 IEEE Antennas and Propagation Society International Symposium, 2000
A low-cost wideband short backfire antenna (SBA) and a circularly polarized (CP) SBA are presente... more A low-cost wideband short backfire antenna (SBA) and a circularly polarized (CP) SBA are presented. The low-cost SBA designed at the 5 GHz UNII band is excited by a planar monopole which is printed on a dielectric substrate and fed by a microstrip line. By splitting the printed monopole with a slot, a wideband performance is achieved. It is demonstrated that the low-cost SBA can achieve an impedance bandwidth of 15% (VSWR<2). The CP SBA is excited by a cross aperture with an unbalanced feed that consists of two orthogonal H-shaped slots with a pair of capacitive stubs. It is shown that the CP SBA can achieve an axial ratio (≤3 dB) bandwidth of 4.2% with a VSWR bandwidth of 6.5 % (VSWR<1.2) and a gain of 14 dBi. As highgain and low-cost wideband/CP directional antennas, the new SBAs can find applications in various wireless communications systems (such as LMDS, WLAN, and the emerging WiMAX networks) and wireless power transmission.
2005 IEEE Antennas and Propagation Society International Symposium, 2000
A vertical W-band surface-micromachined Yagi-Uda monopole array is proposed and implemented for t... more A vertical W-band surface-micromachined Yagi-Uda monopole array is proposed and implemented for the first time. The monopoles stand on a high-k soda-lime glass substrate and are fed by a coplanar waveguide. The geometry functions as a vertically placed Yagi-Uda antenna due to the image theory. The performance of the vertical Yagi-Uda is to be superior to conventional W-band printed antennas due to minimum substrate wave effects. A successful implementation of the vertical Yagi-Uda structure is demonstrated using high-aspect-ratio surface micromachining fabrication technologies. The test results of a 5 element structure demonstrate a 10-dBimpedance-bandwidth of 12% at 100 GHz. A directivity of 8.2 dBi is projected for this prototype.