Analysis, design, and measurement of small and low-profile antennas / Kazuhiro Hirasawa, Misao Haneishi, editors.

Format:

Book

Contributor:

Hirasawa, Kazuhiro, 1941-

Haneishi, Misao.

Language:

English

Subjects (All):

Antennas (Electronics)--Design and construction.

Antennas (Electronics).

Moments method (Statistics).

Physical Description:

xiv, 270 pages : illustrations ; 24 cm

Place of Publication:

Boston : Artech House, [1992]

Contents:

Chapter 2 How to Apply the Moment Method to Wire Antenna Analysis / Kazuhiro Hirasawa 7

2.2 Moment Method Formulation 8

2.2.1 Boundary Condition and Formulation 8

2.2.2 Network Equivalence 14

2.2.3 Calculation of Z[subscript mn] 15

2.2.4 Impedance Loading 15

2.3 Transmitting Antennas 17

2.3.1 Current Distribution and Input Impedance 17

2.3.2 Radiation Pattern and Power Gain 19

2.3.3 Efficiency 21

2.4 Receiving Antennas 22

2.4.1 Current Distribution and Received Power 22

2.4.2 Effective Area 26

2.4.3 Scattering Cross Section 27

2.5 Enhancement of Antenna Performance by Reactive Loading 28

2.5.1 VSWR 28

2.5.2 Power Gain 29

2.5.3 Scattering Cross Section 30

2.6 Antenna Characteristic Analysis Program (ACAP) 31

2.6.1 Input of Antenna Geometry 32

2.6.2 Wire Connection Treatment 32

2.6.3 Output of Antenna Characteristics 34

Appendix 2 ACAP Program 39

Chapter 3 Evaluation of the Basic Performance of Microstrip Antennas / Misao Haneishi 53

3.2 Basic Properties of Microstrip Antennas 53

3.2.1 Radiation Pattern 53

3.2.2 Resonant Frequency of the MSA 57

3.2.3 Unloaded Q(Q[subscript o]), Radiation Efficiency [eta] Bandwidth (BW), and Directivity Gain (G[subscript d]) 58

3.2.4 Impedance Characteristics 61

3.3 Influence of the Finite Ground Plane on Radiation Pattern 66

3.3.1 Estimation of the E-Plane Pattern 67

3.3.2 Estimation of the H-Plane Pattern 68

3.4 Circularly Polarized Microstrip Antennas 68

3.5 Characteristics of Small Microstrip Antennas 71

3.5.1 Basic Configuration 71

3.5.2 Radiation Efficiency [eta] and Frequency Bandwidth (BW) 72

3.5.3 Shorted-Plane-Controlled Type of MSA 73

3.6 Beam Shaping of Microstrip Antennas 75

3.7 Some Considerations on Planar Arrays Composed of MSA 78

Chapter 4 Key Points in the Design and Measurement of Microstrip Antennas / Yasuo Suzuki 83

4.2 Basic Theory 84

4.2.1 Transmission-Line Model 84

4.2.2 Cavity Model 97

4.3 Design Procedure 111

4.3.1 Typical Design Procedure 111

4.3.2 Design Procedure Considering Bandwidth 113

4.3.3 Design Example 119

4.3.4 Error Estimation 124

4.4 Wideband Techniques 126

4.4.1 Various Techniques 126

4.4.2 Some Problems and Corresponding Measures That Can Be Taken 136

4.5 Circular Polarization 144

4.5.1 Dual-Feed Type 144

4.5.2 Single-Feed Type 144

Chapter 5 Analysis of Planar Inverted-F Antennas and Antenna Design for Portable Radio Equipment / Tokio Taga 161

5.2 Analysis by Spatial Network Method (SNM) 162

5.2.1 Analysis Model 162

5.2.2 Effects of Analysis Area Size 163

5.3 Numerical Results 165

5.3.1 Electric Field and Current Distribution 165

5.3.2 Resonant Frequency 169

5.3.3 Bandwidth 174

5.4 Design of a Planar Inverted-F Antenna on a Portable Radio Housing 175

5.4.1 Resonant Frequency 175

5.4.2 Bandwidth 175

5.4.3 Effective Gain in Mobile Radio Environment 177

Chapter 6 Design and Analysis of Small-Aperture Antennas / Tadashi Takano 181

6.2 Directivity Decomposition of Aperture Antennas 184

6.3 Directivity Calculation Method 187

6.4 Remarks on Radiated Field Calculation of Small-Aperture Antennas 190

6.4.1 Problems 190

6.4.2 Diffraction Effects at Reflector Edges 190

6.4.3 Applicability of the Aperture Field Method in Relation to the Distance From an Antenna 192

6.4.4 Geometrical Theory of Diffraction (GTD) and its Applicability 194

6.5 Examples of Small-Aperture Antenna Design 196

6.5.1 Axisymmetrical Cassegrain Antenna 196

6.5.2 Shaped Offset Dual-Reflector Antenna 200

6.5.3 Short Backfire Antenna 202

Chapter 7 Design and Measurement of Small AM Broadcasting Antennas / Hiroshi Okamura 207

7.2 Design 207

7.2.1 Construction 207

7.2.2 Feed-Point Impedance 209

7.2.3 Lower Limit of Antenna Efficiency Regulated by the Ministry of Posts and Telecommunications (Japan) 210

7.3 Antenna Efficiency 211

7.4 Measurement 214

7.4.1 Ground Conductivity and Grounding Resistance 214

7.4.2 Impedance Meter 215

7.4.3 Antenna Efficiency 215

7.5 Techniques for Small AM Broadcasting Antennas 216

7.5.1 Base-Insulated and Guyed Antennas 217

7.5.2 Base-Insulated and Self-Supporting Antennas 218

7.5.3 Base-Grounded and Self-Supporting Antennas 219

Chapter 8 Mutual Coupling Effects Between Antenna Elements on Antenna Performance / Takashi Katagi 221

8.2 The Effects of Mutual Coupling Between Antenna Elements on Antenna Performance 221

8.3 Reduction of Mutual Coupling Effects 225

8.4 Analysis and Measurement of Mutual Coupling 228

8.4.1 Analysis of Mutual Coupling 228

8.4.2 Measurement of Mutual Coupling 233

8.5 Use of Mutual Coupling Effects 236

Chapter 9 Some Considerations of Small Antenna Measurements / Kyohei Fujimoto 241

9.2 Definition of Small Antennas 242

9.3 Things to Consider Prior to Measurement 243

9.3.1 Small Antennas 243

9.3.2 Antenna Structure 246

9.3.3 Balanced-Unbalanced Transformation 247

9.3.4 The Effect of Nearby Conducting Materials 249

9.3.5 The Accuracy, Precision, and Stability of the Instrument 250

9.3.6 Other Factors 250

9.4 Measurements 251

9.4.1 Impedance 251

9.4.2 Radiation Pattern 254

9.4.3 Efficiency 257

9.4.4 Gain 262

9.5 Related Subjects 263

9.5.1 Environmental Effects 263

9.5.2 Skill in Performing Measurement 264.

Notes:

Includes bibliographical references and index.

ISBN:

0890064865

OCLC:

24142392