ABSTRACT Microwave technology plays a vital role in diagnostic and detection of different blood v... more ABSTRACT Microwave technology plays a vital role in diagnostic and detection of different blood viruses. The technology presented here is microstrip antenna with proximity coupling feed sensor known as “Microstrip Cavity Resonator Biosensor (MCRB)”. It is mainly based on the very specific immune reaction between antigen and antibody. The proposed method depends on the fact that the electrical properties of the liquid, i.e. water, blood, etc., as dielectric constant, electrical conductivity and resistivity are changed due to the existence of viruses, their antibodies and/or their antigens. These electrical changes could be measured from the changes of reflection coefficient, input impedance and resonance frequency of the cavity resonator of the biosensor. Proximity coupled feed circular disc antenna is used in sensor design. Proposed antennas are modified to operate at two different bands, one band at Industrial scientific and medical (ISM 2.45GHz) and the other band at wireless local area network (WLAN 5.2 GHz). The studies of the change of electrical properties of reconstituted serum samples are presented at both frequencies to detect different concentrations of Rota virus.
IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450)
A dual-band internal planar inverted-F antenna (PIFA) is proposed for 2.4 GHz Bluetooth (ISM) and... more A dual-band internal planar inverted-F antenna (PIFA) is proposed for 2.4 GHz Bluetooth (ISM) and wireless area network (WLAN) 5.2 GHz (IEEE 802.116) applications. The antenna has a rigid design with a foam substrate so it can be integrated easily with the Bluetooth housing of personal digital assistant (PDA) devices. A U-shaped slot is etched in the top plate to achieve the dual-band operation. The antenna has a single feed with total compact size of 14×15×6 mm3. The antenna bandwidth is 4% and 4.3% at the lower and upper frequencies, respectively.
IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450)
In this paper, a wideband shorted microstrip rectangular patch antenna (SMRPA) is proposed for Bl... more In this paper, a wideband shorted microstrip rectangular patch antenna (SMRPA) is proposed for Bluetooth and wireless LAN applications. The wideband performance is achieved by inserting a U-shaped slot of unequal arms on the patch surface so that two adjacent resonant modes are exited. The designed antenna at 4.95 GHz has an overall length of λ0/4 with bandwidth of 24%
IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)
... bands, fn - 1.1, 2.4 and 5.1, 5.7 GHr, are chosen to Lie within the existing PCS and Bluetoot... more ... bands, fn - 1.1, 2.4 and 5.1, 5.7 GHr, are chosen to Lie within the existing PCS and Bluetooth bands and the two future Bluetooth ... SINGLE BAND FREQ~JENCY ANALYSIS The antenna geometries studied are the circular patch and semi-circular patch shown in Figures 1 (a) and ...
IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229), 2001
The moment method is used to analyze a microstrip patch antenna. Although the method is general, ... more The moment method is used to analyze a microstrip patch antenna. Although the method is general, it is applied to a rectangular shape for simplicity. An accuracy of 5% is obtained. A modification in the method of calculating the input impedance is made. The accuracy is improved by up to 0.05%, with approximately no increase in calculation time, as compared
2009 IEEE Antennas and Propagation Society International Symposium, 2009
Abstract: - As wireless communications applications continue to require more and more bandwidth, ... more Abstract: - As wireless communications applications continue to require more and more bandwidth, there has been continued increase in demand for ultra-wide bandwidth antennas. Planar monopole antennas are generally suitable for mobile applications and ...
2009 IEEE Antennas and Propagation Society International Symposium, 2009
Abstract:- Microstrip patch antennas with inset feed have been studied extensively over the past ... more Abstract:- Microstrip patch antennas with inset feed have been studied extensively over the past two decades because of its practical advantage when used in mobile wireless systems. The length of MPA, however, is comparable to a half wavelength with single resonant ...
2009 IEEE Antennas and Propagation Society International Symposium, 2009
Abstract:- This paper presents an investigation of both electromagnetic wave model and equivalent... more Abstract:- This paper presents an investigation of both electromagnetic wave model and equivalent circuit model for microstrip patch antenna (MPA) with rectangular defected ground plane structure (RDGS). The objective of the proposed design is to reduce antenna size from Wi-Fi ...
2008 IEEE Antennas and Propagation Society International Symposium, 2008
The two main properties of fractal self-similarity and space-filling are studied. Predictable mul... more The two main properties of fractal self-similarity and space-filling are studied. Predictable multiband characteristics are explained. A new design based on both the Sierpinski Gasket and Koch Island is presented. A Pulse 2.45 (the generator of this antenna shape is pulse and the initiator is a rectangular microstrip patch resonating at 2.45 GHz) is investigated. Modifications in the design are
2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
A design of frequency reconfigurable PIFA antenna is presented in this paper. The antenna consist... more A design of frequency reconfigurable PIFA antenna is presented in this paper. The antenna consists of halves of three concentric rectangular patches. Five RF PIN diodes are inserted in proper locations for frequency reconfigurability. Four switching cases are considered. The first case (all switches are ON) results in a single-band operation at 850 MHz with impedance bandwidth of 12.9%. The second case (four switches are ON) results in dual-band operation at 810 MHz and 2.45 GHz with impedance bandwidths of 12% and 5.7%, respectively. Whereas the third case (two switches are ON) offers a dual-band operation, at 1.471 and 2.62 GHz with impedance bandwidth of 11.7% and 4.1%, respectively. Finally, the fourth case (all switches are OFF), the antenna radiates at 3.35 GHz with impedance bandwidth of 8.8%. The antenna covers several wireless communication applications as LTE, GSM 850, CDMA 850, Wi-Max, WLAN, Bluetooth, and Wi-Fi. The antenna is analysed using CST Microwave Studio, fabricated with photolithographic and scattering parameters are measured. Measurements and simulations show good agreement.
IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313)
We have developed a novel wireless microwave communication input system that allows users to intu... more We have developed a novel wireless microwave communication input system that allows users to intuitively specify three-dimensional (3D) coordinates in graphics applications. The system depends on combining the microwave holography technique with an appropriate microstrip antenna array system to create the hologram of any desired point in 3D space. A new established software driver called Correlation executes the retrieval of
IEEE Transactions on Antennas and Propagation, 2005
In this paper, a novel compact single feed quad-band planar inverted F-antenna (PIFA) is presente... more In this paper, a novel compact single feed quad-band planar inverted F-antenna (PIFA) is presented. Two techniques to reduce the physical size are illustrated. First, we insert U-shaped slits within the antenna-radiating surface. This forces the current to flow around the obstacles hence, reducing the resonant frequency. This technique reduces the size by about 30% from the original PIFA. Second,
IEEE Antennas and Wireless Propagation Letters, 2012
A finite-difference time-domain (FDTD) modeling of the wave propagation in a Cole–Cole dispersive... more A finite-difference time-domain (FDTD) modeling of the wave propagation in a Cole–Cole dispersive media is presented. Since the empirical Debye and Lorentz models are not accurate for the representation of the frequency dependence of some dispersive media terms, the Cole–Cole dispersion relation was used to model the electromagnetic properties of biological tissues. The main problem in time-domain modeling of the Cole–Cole model is the approximation of the fractional derivatives that appear in the model equation. Researchers face this problem by approximating the Cole–Cole terms (poles) by a sum of Debye terms or by a sum of decaying exponentials or by polynomials. The accuracy of these models depends on the number of terms needed to model each Cole–Cole term, which may consume large amounts of time and memory. In this letter, all the FDTD fields are approximated by a linear function of time that has a closed form for its fractional derivative. The proposed scheme is considered the more general scheme that has the capability to model $n$th-order Debye and Cole–Cole models. The scheme is a straightforward extension that can deal with other models such as Lorenz, Drude, and the chiral media. Promising results are observed when calculating the reflection coefficient at an air/muscle material interface. The SAR distribution within a Cole–Cole equivalent brain spherical material excited by an infinitesimal dipole is calculated and compared to the normal FDTD at 900 MHz.
ABSTRACT Microwave technology plays a vital role in diagnostic and detection of different blood v... more ABSTRACT Microwave technology plays a vital role in diagnostic and detection of different blood viruses. The technology presented here is microstrip antenna with proximity coupling feed sensor known as “Microstrip Cavity Resonator Biosensor (MCRB)”. It is mainly based on the very specific immune reaction between antigen and antibody. The proposed method depends on the fact that the electrical properties of the liquid, i.e. water, blood, etc., as dielectric constant, electrical conductivity and resistivity are changed due to the existence of viruses, their antibodies and/or their antigens. These electrical changes could be measured from the changes of reflection coefficient, input impedance and resonance frequency of the cavity resonator of the biosensor. Proximity coupled feed circular disc antenna is used in sensor design. Proposed antennas are modified to operate at two different bands, one band at Industrial scientific and medical (ISM 2.45GHz) and the other band at wireless local area network (WLAN 5.2 GHz). The studies of the change of electrical properties of reconstituted serum samples are presented at both frequencies to detect different concentrations of Rota virus.
IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450)
A dual-band internal planar inverted-F antenna (PIFA) is proposed for 2.4 GHz Bluetooth (ISM) and... more A dual-band internal planar inverted-F antenna (PIFA) is proposed for 2.4 GHz Bluetooth (ISM) and wireless area network (WLAN) 5.2 GHz (IEEE 802.116) applications. The antenna has a rigid design with a foam substrate so it can be integrated easily with the Bluetooth housing of personal digital assistant (PDA) devices. A U-shaped slot is etched in the top plate to achieve the dual-band operation. The antenna has a single feed with total compact size of 14×15×6 mm3. The antenna bandwidth is 4% and 4.3% at the lower and upper frequencies, respectively.
IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450)
In this paper, a wideband shorted microstrip rectangular patch antenna (SMRPA) is proposed for Bl... more In this paper, a wideband shorted microstrip rectangular patch antenna (SMRPA) is proposed for Bluetooth and wireless LAN applications. The wideband performance is achieved by inserting a U-shaped slot of unequal arms on the patch surface so that two adjacent resonant modes are exited. The designed antenna at 4.95 GHz has an overall length of λ0/4 with bandwidth of 24%
IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)
... bands, fn - 1.1, 2.4 and 5.1, 5.7 GHr, are chosen to Lie within the existing PCS and Bluetoot... more ... bands, fn - 1.1, 2.4 and 5.1, 5.7 GHr, are chosen to Lie within the existing PCS and Bluetooth bands and the two future Bluetooth ... SINGLE BAND FREQ~JENCY ANALYSIS The antenna geometries studied are the circular patch and semi-circular patch shown in Figures 1 (a) and ...
IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229), 2001
The moment method is used to analyze a microstrip patch antenna. Although the method is general, ... more The moment method is used to analyze a microstrip patch antenna. Although the method is general, it is applied to a rectangular shape for simplicity. An accuracy of 5% is obtained. A modification in the method of calculating the input impedance is made. The accuracy is improved by up to 0.05%, with approximately no increase in calculation time, as compared
2009 IEEE Antennas and Propagation Society International Symposium, 2009
Abstract: - As wireless communications applications continue to require more and more bandwidth, ... more Abstract: - As wireless communications applications continue to require more and more bandwidth, there has been continued increase in demand for ultra-wide bandwidth antennas. Planar monopole antennas are generally suitable for mobile applications and ...
2009 IEEE Antennas and Propagation Society International Symposium, 2009
Abstract:- Microstrip patch antennas with inset feed have been studied extensively over the past ... more Abstract:- Microstrip patch antennas with inset feed have been studied extensively over the past two decades because of its practical advantage when used in mobile wireless systems. The length of MPA, however, is comparable to a half wavelength with single resonant ...
2009 IEEE Antennas and Propagation Society International Symposium, 2009
Abstract:- This paper presents an investigation of both electromagnetic wave model and equivalent... more Abstract:- This paper presents an investigation of both electromagnetic wave model and equivalent circuit model for microstrip patch antenna (MPA) with rectangular defected ground plane structure (RDGS). The objective of the proposed design is to reduce antenna size from Wi-Fi ...
2008 IEEE Antennas and Propagation Society International Symposium, 2008
The two main properties of fractal self-similarity and space-filling are studied. Predictable mul... more The two main properties of fractal self-similarity and space-filling are studied. Predictable multiband characteristics are explained. A new design based on both the Sierpinski Gasket and Koch Island is presented. A Pulse 2.45 (the generator of this antenna shape is pulse and the initiator is a rectangular microstrip patch resonating at 2.45 GHz) is investigated. Modifications in the design are
2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
A design of frequency reconfigurable PIFA antenna is presented in this paper. The antenna consist... more A design of frequency reconfigurable PIFA antenna is presented in this paper. The antenna consists of halves of three concentric rectangular patches. Five RF PIN diodes are inserted in proper locations for frequency reconfigurability. Four switching cases are considered. The first case (all switches are ON) results in a single-band operation at 850 MHz with impedance bandwidth of 12.9%. The second case (four switches are ON) results in dual-band operation at 810 MHz and 2.45 GHz with impedance bandwidths of 12% and 5.7%, respectively. Whereas the third case (two switches are ON) offers a dual-band operation, at 1.471 and 2.62 GHz with impedance bandwidth of 11.7% and 4.1%, respectively. Finally, the fourth case (all switches are OFF), the antenna radiates at 3.35 GHz with impedance bandwidth of 8.8%. The antenna covers several wireless communication applications as LTE, GSM 850, CDMA 850, Wi-Max, WLAN, Bluetooth, and Wi-Fi. The antenna is analysed using CST Microwave Studio, fabricated with photolithographic and scattering parameters are measured. Measurements and simulations show good agreement.
IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313)
We have developed a novel wireless microwave communication input system that allows users to intu... more We have developed a novel wireless microwave communication input system that allows users to intuitively specify three-dimensional (3D) coordinates in graphics applications. The system depends on combining the microwave holography technique with an appropriate microstrip antenna array system to create the hologram of any desired point in 3D space. A new established software driver called Correlation executes the retrieval of
IEEE Transactions on Antennas and Propagation, 2005
In this paper, a novel compact single feed quad-band planar inverted F-antenna (PIFA) is presente... more In this paper, a novel compact single feed quad-band planar inverted F-antenna (PIFA) is presented. Two techniques to reduce the physical size are illustrated. First, we insert U-shaped slits within the antenna-radiating surface. This forces the current to flow around the obstacles hence, reducing the resonant frequency. This technique reduces the size by about 30% from the original PIFA. Second,
IEEE Antennas and Wireless Propagation Letters, 2012
A finite-difference time-domain (FDTD) modeling of the wave propagation in a Cole–Cole dispersive... more A finite-difference time-domain (FDTD) modeling of the wave propagation in a Cole–Cole dispersive media is presented. Since the empirical Debye and Lorentz models are not accurate for the representation of the frequency dependence of some dispersive media terms, the Cole–Cole dispersion relation was used to model the electromagnetic properties of biological tissues. The main problem in time-domain modeling of the Cole–Cole model is the approximation of the fractional derivatives that appear in the model equation. Researchers face this problem by approximating the Cole–Cole terms (poles) by a sum of Debye terms or by a sum of decaying exponentials or by polynomials. The accuracy of these models depends on the number of terms needed to model each Cole–Cole term, which may consume large amounts of time and memory. In this letter, all the FDTD fields are approximated by a linear function of time that has a closed form for its fractional derivative. The proposed scheme is considered the more general scheme that has the capability to model $n$th-order Debye and Cole–Cole models. The scheme is a straightforward extension that can deal with other models such as Lorenz, Drude, and the chiral media. Promising results are observed when calculating the reflection coefficient at an air/muscle material interface. The SAR distribution within a Cole–Cole equivalent brain spherical material excited by an infinitesimal dipole is calculated and compared to the normal FDTD at 900 MHz.
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