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Proceedings ArticleDOI

Dual band compact inset CPW feed antenna with DGS

TL;DR: This paper presents design of antenna for worldwide interoperability for microwave access and Wireless Local area network and uses inset feed for achieving a good impedance matching with compactness.
Abstract: This paper presents design of antenna for worldwide interoperability for microwave access (2.3–2.4GHz and 2.5–2.69GHz) and Wireless Local area network (2.4–2.484GHz & 5.15 GHz). The proposed design uses inset feed for achieving a good impedance matching with compactness. The fundamental frequency of the design is 2.6 GHz; Implementing defected ground structure provides additional frequency at 5.15 GHz and shifts the fundamental frequency to 2.5GHz. Different lengths of DGS and its effect on antenna performance and resonance frequency are analyzed. High Frequency Structure simulator is used to analyze the design.
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Journal ArticleDOI
TL;DR: In this paper, a dual-band double-T monopole antenna is proposed for WLAN operation in the 2.4 and 5.2 GHz bands, which consists of two stacked T-shaped monopoles of different sizes, which generate two separate resonant modes for the desired dualband operation.
Abstract: A novel and simple printed dual-band double-T monopole antenna is proposed. The antenna comprises two stacked T-shaped monopoles of different sizes, which generate two separate resonant modes for the desired dual-band operation. The proposed antenna has a low profile and can easily be fed by using a 50 /spl Omega/ microstrip line. Prototypes of the proposed antenna designed for WLAN operations in the 2.4 and 5.2 GHz bands have been constructed and tested. Good radiation characteristics of the proposed antenna have been obtained. Effects of varying the monopole dimensions and the ground-plane size on the antenna performance have also been studied.

596 citations


"Dual band compact inset CPW feed an..." refers background in this paper

  • ...In [9, 10] dual band at WLAN and Wi-Max has been designed with better performance but it needs back side ground plane and requires large antenna size....

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Journal ArticleDOI
TL;DR: In this paper, a novel printed monopole antenna with dual wideband is presented for simultaneously satisfying wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications.
Abstract: A novel printed monopole antenna with dual widebands is presented for simultaneously satisfying wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications. The antenna structure consists of a rectangular monopole with a microstrip feedline for excitation and a trapezoid conductor-backed plane for band broadening. The measured 10 dB bandwidth for return loss is from 2.01 to 4.27 GHz and 5.06 to 6.79 GHz, covering all the 2.4/5.2/5.8 GHz WLAN bands and 2.5/3.5/5.5 GHz WiMAX bands

289 citations


"Dual band compact inset CPW feed an..." refers background in this paper

  • ...In [9, 10] dual band at WLAN and Wi-Max has been designed with better performance but it needs back side ground plane and requires large antenna size....

    [...]

Book
11 Jan 2013
TL;DR: Waterhouse et al. as mentioned in this paper proposed an approach to improve the performance of single-layer patch antennas by reducing the size of the patch array and increasing the bandwidth of the antenna array.
Abstract: Acknowledgements. 1: Introduction R. Waterhouse. 1.1. History. 1.2. Advantages and Issues. 1.3. Applications. 1.4. Summary of Book. 1.5. Bibliography. 2: Fundamental Properties of Single Layer Microstrip Patch Antennas R. Waterhouse, D. Novak, D.-K. Park, Y. Qian, T. Itoh. 2.1. Introduction. 2.2. General Theory of Operation and Design Tools. 2.3. The Effect of Conductor Shape. 2.4. Impedance and Radiation Performance of Single Layer Patches. 2.5. Excitation Methods of Microstrip Patches. 2.6. Circular Polarization Generation. 2.7. Summary. 2.8. Bibliography. 3: Enhancing the Bandwidth of Microstrip Patch Antennas R. Waterhouse, J.T. Aberle, D. M. Kokotoff, A. Mitchell, M. Lech, S.D. Targonski, M. Lye, F. Zavosh, K. Ghorbani, D. Novak, A. Nirmalathas, C. Lim. 3.1. Introduction. 3.2. Intuitive Procedures. 3.3. Horizontally Coupled Parasitic Patches. 3.4. Stacked Patches. 3.5. Large Slot Excited Patches. 3.6. Aperture Stacked Patches. 3.7. Ultra-wideband ASPs. 3.8. Summary. 3.9. Bibliography. 4: Improving the Efficiency of Microstrip Patch Antennas R. Waterhouse, D. Pavlickovski, D. M. Kokotoff, J.T. Aberle. 4.1. Introduction. 4.2. Surface Waves. 4.3. Patches that do not Excite TM Surface Waves. 4.4. Hi-lo Stacked Patches. 4.5. Photonic Band-gap Structures. 4.6. Summary. 4.7. Bibliography. 5: Small Microstrip Patch Antennas R. Waterhouse, H.K. Kan, D.M. Kokotoff, S.D. Targonski, J.T. Rowley, D. Pavlickovski. 5.1. Introduction. 5.2. Shorted Microstrip Patches. 5.3. Further Size Reduction Techniques for Shorted Patches. 5.4. Winged Shorted Patch. 5.5. Shorted Spiral Patches. 5.6. Improving the Performances of Shorted Microstrip Patches. 5.7. Performance of Shorted Microstrip Patch Antennas for Mobile Communications Handsets at 1800 MHz. 5.8. Summary. 5.9. Bibliography. 6: Direct Integration of Microstrip Antennas R. Waterhouse, W.S.T. Rowe, D. Novak, A. Nirmalathas, C. Lim. 6.1. Overview for Requirernents for Integration. 6.2. Slot Coupled Procedures and Solutions. 6.3. Direct Contact Procedures and Solutions. 6.4. Summary. 6.5. Bibliography. 7: Microstrip Patch Arrays R. Waterhouse, K. Ghorbani, W.S.T. Rowe, S.D. Targonski, L. Mali, H.K. Kan, D. Novak, A. Nirmalathas, C. Lim. 7.1. Introduction. 7.2. Series Fed Arrays. 7.3. Parallel Fed Arrays. 7.4. Combination Fed Arrays. 7.5. Large Scanned Arrays of Microstrip Patches. 7.6. Alternatives to Large Arrays of Microstrip Patches. 7.7. Wraparound Patch Antenna Arrays. 7.8. Summary. 7.9. Bibliography. 8: Summary R. Waterhouse. 8.1. Overview. 8.2. Future Directions of Microstrip Patch Technology. 8.3. Bibliography. List of Contributors.

201 citations

Journal ArticleDOI
TL;DR: In this paper, a 1-dimensional (1-D) periodic defected ground structure (DGS) for microstrip line is presented, and two improved periodic DGS circuits are designed, fabricated, and measured.
Abstract: A novel one-dimensional (1-D) periodic defected ground structure (DGS) for microstrip line is presented in this letter. Different from the periodic DGS with uniform square-patterned defects, the improved periodic DGS has a compensated microstrip line and the dimensions of the square defects are nonuniform and varied proportionally to the relative amplitudes distribution of the exponential function e/sup 1/n/ (n denotes the positive integer). A uniform periodic DGS circuit and two improved periodic DGS circuits are designed, fabricated, and measured. Measurements show that the latter exhibit more excellent performances by suppressing ripples and enlarging stopband bandwidth.

124 citations

Book
11 Jul 2006
TL;DR: In this paper, the authors present an analysis of the Coplanar Waveguide with a single center strip and infinite ground-plane width, as well as a finite difference method.
Abstract: Preface. 1. Introduction. References. 2. Transmission Properties of Coplanar Waveguides. 2.1 Rigorous, Full-Wave Analysis of Transmission Properties. 2.1.1 The Coplanar Waveguide with a Single Center Strip and Finite Ground-Plane Width. 2.1.2 The Coplanar Waveguide with a Single Center Strip and Infinite Ground-Plane Width. 2.1.3 Coupled Coplanar Waveguides. 2.1.3.1 Scattering Matrix of Coupled Coplanar Waveguides. 2.1.3.2 Coupled Coplanar Waveguides and Microstrip Lines-A Comparison. 2.2 Quasi-Static Analysis of Coplanar Waveguides Using the Finite Difference Method. 2.2.1 Introduction. 2.2.2 The Finite Difference Method as Applied to the Analysis of Coplanar Waveguide Structures. 2.2.3 The Solution of Laplace's Equation for Planar and Coplanar Line Structures Using the Finite Difference Method. 2.2.4 Application of the Quasi-Static Techniques to the Analysis of Coplanar Waveguides. 2.2.5 Characteristic Parameters of Coplanar Waveguides. 2.2.6 The Influence of the Metalization Thickness on the Line Parameters. 2.2.7 The Influence of the Ground Strip Width on the Line Parameters. 2.2.8 The Influence of the Shielding on the Line Parameters. 2.2.9 Special Forms of Coplanar Waveguides. 2.2.10 Coplanar-like Waveguides. 2.2.11 Coupled Coplanar Waveguide Structures. 2.2.11.1 Analysis of the Characteristic Parameter Matrices. 2.2.11.2 Determination of the Scattering Matrix of Coupled Coplanar Waveguides. 2.3 Closed Formula Static Analysis of Coplanar Waveguide Properties. 2.3.1 Analysis of a Generalized Coplanar Waveguide with Supporting Substrate Layers. 2.3.1.1 Structure SCPW1. 2.3.1.2 Structure SCPW2. 2.3.1.3 Structure SCPW3. 2.3.1.4 Numerical Results. 2.3.2 Static Formulas for Calculating the Parameters of General Broadside-Coupled Coplanar Waveguides. 2.3.2.1 Analytical Formulas and Results for the General Broadside-Coupled Coplanar Waveguide. 2.3.2.2 Analysis of an Asymmetric Supported BSC-CPW. 2.3.2.3 Application of the GBSC-CPW as Single CPW. 2.3.2.4 Criteria for the Coplanar Behavior of the Structure. Bibliography and References. 3. Coplanar Waveguide Discontinuities. 3.1 The Three-Dimensional Finite Difference Analysis. 3.2 Computation of the Electric Field Strength. 3.3 Computation of the Magnetic Field Strength. 3.3.1 Convergence and Error Discussion for the Analysis Technique. 3.4 Coplanar Waveguide Discontinuities. 3.4.1 Modeling the Discontinuities. 3.4.2 Extraction of the Model Parameters. 3.5 Description of Coplanar Waveguide Discontinuities. 3.5.1 The Coplanar Open End. 3.5.2 The Coplanar Waveguide Short-Circuited End. 3.5.3 The Gap in a Coplanar Waveguide. 3.5.4 The Coplanar Waveguide Step. 3.5.5 Air Bridges in Coplanar Waveguides. 3.5.6 The Coplanar Waveguide Bend. 3.5.7 The Coplanar Waveguide T-Junction. 3.5.7.1 Analysis of the Odd-Mode Excitation. 3.5.8 The Coplanar T-Junction as a Mode Converter. 3.5.9 The Coplanar Waveguide Crossing. Bibliography and References. 4. Coplanar Lumped Elements. 4.1 Introduction. 4.2 The Coplanar Interdigital Capacitor. 4.2.1 The Lumped Element Modeling Approach. 4.2.2 Enhancement of the Interdigital Capacitor Model for Application at Millimeter-Wave Frequencies. 4.3 The Coplanar Metal-Insulator-Metal (MIM) Capacitor. 4.4 The Coplanar Spiral Inductor. 4.4.1 Enhancement of the Inductor Model for Millimeter-Wave Frequencies. 4.4.2 Coupled Coplanar Rectangular Inductors. 4.5 The Coplanar Rectangular Spiral Transformer. 4.6 The Coplanar Thin-Film Resistor. Bibliography and References. 5. Coplanar Element Library and Circuit Design Program. 5.1 Introduction. 5.2 Modeling, Convergence, and Accuracy. 5.3 Overview on Coplan for ADSTM. 5.3.1 Data Items. 5.3.2 Library Elements. 5.4 Cache Management. 5.5 Layout. 5.6 Coplanar Data Items. 5.6.1 Overview. 5.6.2 Description of the Data Items. 5.6.2.1 Coplanar Substrate Data Definition C-SUB. 5.6.2.2 Coplanar Line-Type Data Definition C-LINTYP. 5.6.2.3 Coplanar Coupled Lines Data Definition C-NL-TYP. 5.6.2.4 Coplanar Bridge-Type Data Definition C-AIRTYP. 5.6.2.5 Coplanar Grid Data Definition C-GRID. 5.6.2.6 Process (Foundry) Used for Fabrication C-PROCES. 5.6.2.7 Technological Data Definition (Default Foundry) C-TECH. 5.6.2.8 Layer Data Definition (Default Foundry) C-LAYER. 5.7 The Coplanar Components and Their Models. 5.7.1 Coplanar Waveguide RF-Port C-PORT. 5.7.2 Coplanar Transmission Line C-LIN. 5.7.3 Coplanar Inter-Metal via (No Step) Connection C-METIA. 5.7.4 Coplanar Resistively Loaded Transmission Line C-TFG. 5.7.5 Coplanar MIM-Capacitor to Ground C-CAPLIN. 5.7.6 Coplanar Open-Ended Transmission Line C-OPEN. 5.7.7 Coplanar Short-Circuited Transmission Line C-SHORT. 5.7.8 Gap in a Coplanar Transmission Line C-GAP. 5.7.9 Step in a Coplanar Transmission Line C-STEP. 5.7.10 Coplanar Waveguide Taper C-TAPER. 5.7.11 Coplanar Air Bridges C-AIR. 5.7.12 Bend in a Coplanar Transmission Line C-BEND. 5.7.13 T-Junction in Coplanar Transmission Lines C-TEE. 5.7.14 Crossing of Coplanar Transmission Lines C-CROSS. 5.7.15 Coplanar Interdigital Capacitor C-IDC. 5.7.16 Coplanar Rectangular Inductor C-RIND. 5.7.17 Coplanar Thin-Film Resistor C-TFR. 5.7.18 Coplanar Metal-Insulator-Metal Capacitor C-MIM. Bibliography. 6. Coplanar Filters and Couplers. 6.1 Coplanar Lumped Element Filters. 6.1.1 The Coplanar Spiral Inductor as a Filter. 6.1.2 Design and Realization. 6.1.3 Results. 6.1.4 Phase-Shifting Filter Circuits. 6.2 Coplanar Passive Lumped-Element Band-Pass Filters. 6.2.1 Theoretical Background. 6.2.2 Properties of the Coplanar Hybrid Band-Pass Filters. 6.3 Special Coplanar Waveguide Filters. 6.3.1 The Coplanar Band-Reject Filter. 6.3.1.1 The Hybrid Band-Reject Filter. 6.3.1.2 The Monolithic Band-Reject Filter. 6.3.2 Coplanar Millimeter-Wave Filters. 6.4 Coplanar Edge-Coupled Line Structures. 6.4.1 Verification of Coupling Between Coupled Coplanar Waveguides. 6.4.2 End-Coupled Coplanar Line Structures. 6.4.3 Coplanar Waveguide End-Coupled to an Orthogonal Coplanar Waveguide. 6.5 Coupled Coplanar Waveguide Filters and Couplers. 6.5.1 Interdigital Filter Design. 6.5.2 Coplanar Waveguide Couplers. 6.6 Coplanar MMIC Wilkinson Couplers. 6.6.1 Conventional Wilkinson Couplers. 6.6.2 Wilkinson Couplers with Discrete Elements. 6.6.3 MMIC Applicable Wilkinson Couplers with Coplanar Lumped Elements. 6.6.4 Wilkinson Coupler in Coplanar Waveguide Technique for Millimeter-Wave Frequencies. Bibliography and References. 7. Coplanar Microwave Integrated Circuits. 7.1 Introduction. 7.1.1 The Effect of the Shielding on Modeling. 7.1.2 The Waveguide Properties. 7.2 Coplanar Transistors and Coplanar Switches. 7.2.1 Active Power Dividers and Combiners and Switches. 7.2.1.1 Power Dividers and Combiners. 7.2.1.2 Fundamental Coplanar Switch Circuits. 7.2.1.3 Results and Measurements. 7.2.1.4 Device Scaling. 7.2.1.5 Design and Realization of Coplanar RF Switches. 7.3 Coplanar Microwave Active Filters. 7.3.1 Introduction. 7.3.2 The Coplanar Active Inductor. 7.3.3 The First-Order Active Coplanar Band-Pass Filter. 7.3.4 The Fixed Center Frequency Second-Order Active Filter. 7.3.5 The Coplanar Active Tunable Filter. 7.4 Coplanar Microwave Amplifiers. 7.4.1 Coplanar Microwave Amplifiers in Waveguide Design. 7.4.1.1 Introduction. 7.4.1.2 Circuit Design and Technological Aspects. 7.4.1.3 Results and Comparison with Measurements. 7.4.2 Coplanar Lumped-Element MMIC Amplifiers. 7.4.2.1 Introduction. 7.4.2.2 MMIC Design and Results. 7.4.3 Influence of the Backside Metalization on the Design of a Coplanar Low-Noise Amplifier. 7.4.3.1 Modeling the Transistor and Its Noise Properties. 7.4.3.2 The Coplanar LNA Design. 7.4.3.3 Simulation Results. 7.4.3.4 Measurement Results. 7.4.4 Miniaturized Ka-band MMIC High-Gain Medium-Power Amplifier in Coplanar Waveguide Technique. 7.4.4.1 Introduction. 7.4.4.2 MMIC Design and Results. 7.5 Coplanar Electronic Circulators. 7.6 Coplanar Frequency Doublers. 7.6.1 Different Realization Concepts of FET Frequency Doublers. 7.6.1.1 The Single-Device FET Frequency Doubler. 7.6.1.2 The Balanced (Push-Push) FET Frequency Doubler. 7.6.1.3 The Wideband FET Frequency Doubler. 7.6.2 Realization of Coplanar Frequency Doublers. 7.6.2.1 The Coplanar Balanced Hybrid MIC Frequency Doubler. 7.6.2.2 The Coplanar Balanced Monolithic MIC Frequency Doubler. 7.6.3 A Coplanar Times Five Frequency Multiplier. 7.7 Microwave and Millimeter-Wave Oscillators in Coplanar Technology. 7.7.1 Coplanar Microwave Oscillators. 7.7.2 A 5-GHz Coplanar Voltage-Controlled Oscillator. Bibliography and References. Index.

102 citations


"Dual band compact inset CPW feed an..." refers background or methods in this paper

  • ...1 shows the basic geometry of CPW. Characteristic impedance formulas of coplanar waveguide were studied in [2] and it is given in Fig 2....

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  • ...The important criteria is maintaining equal potential in two ground planes and it is necessary for a even mode excitation in CPW [3, 4]....

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  • ...In antenna design CPW technology also provides unique advantages over conventional printed microstrip antennas like easy fabrication, connection of active and passive lumped elements, lower cross polarization produced from the feed network and Omni- directional radiation coverage....

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  • ...CPW technology offers ground at the same layer itself so that vias can be eliminated....

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  • ...Basic Geometry of CPW For good impedance matching with reduction in antenna size we use inset feed to the proposed antenna....

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