Contents
CHAPTER 1 The Array Adjustment Process
1.2 The Directional Antenna Adjusting Process
2.4.4 An Input File Illustration
2.5.2 Structure Specifications
2.5.4 Data Commands, Frequency, Loading, and Environment Data
2.5.5 Antenna Input Parameters
CHAPTER 3 Modeling the Radiator
3.2.2 Modeling the Voltage Source
3.3.1 Single-Wire Configuration
3.4 Viewing Tower Configuration
4.2 Array Geometry: An Example
CHAPTER 5 Loads, Networks, and Transmission Lines
5.2 Modeling Nonradiating Networks
5.2.2 Typical Network Applications
5.2.3 General Guidelines for Networks
5.3 Modeling Transmission Lines
5.4 Network Output File Listing
5.4.2 Source and Load Impedance to the Networks
5.4.3 Network Input Parameters
CHAPTER 6 Calculating Base Drive Voltages
6.2 Direct and Induced Currents
6.4.4 Shunt Reactance and Networks
6.5 Example: A Three-Tower Array
6.5.1 Create a Unity Drive File
6.5.2 Calculate Unity Drive Current Moments
6.5.3 Solve for the Normalized Drive Voltages
6.5.4 Determine the Full Power Drive Voltages
CHAPTER 7 Using Data from the Output File
7.3 Plot Far-Field Radiation Pattern
7.4.1 Detuning by Base Loading
7.5.1 Optimum Height for Sample Loops
7.5.2 Arbitrary Height for Sample Loops
7.6.1 Drive Point Impedance When Using a Network
CHAPTER 8 Model by Measurement
8.2.3 Segment and Radius Taper
CHAPTER 9 Top-Loaded and Skirted Towers
9.2.1 Estimating the Size of the Top Hat
9.2.2 Determining the Degree of Top Loading
CHAPTER 10 System Bandwidth Analysis
10.2.2 Tower Base Drive Voltages
10.3.1 Source Impedance of the Drive Voltage
10.3.3 Total System Bandwidth Data
11.2 Case Study 1: Three-Tower Array
11.2.1 Array Description: Three-Tower Array
11.2.2 Self-Impedance: Three-Tower Array
11.2.3 Antenna Monitor Reading: Three-Tower Array
11.2.4 Array Data: Three-Tower Array
11.2.5 Discussion: Three-Tower Array
11.2.6 NEC-2 Input File: Three-Tower Array
11.3 Case Study 2: Six-Tower Array, Day Pattern
11.3.1 Array Description: Six-Tower Array, Day Pattern
11.3.2 Self-impedance: Six-Tower Array, Day Pattern
11.3.3 Antenna Monitor Reading: Six-Tower Array, Day Pattern
11.3.4 Array Data: Six-Tower Array, Day Pattern
11.3.5 Discussion: Six-Tower Array, Day Pattern
11.4 Case Study 3: Six-Tower Array, Night Pattern
11.4.1 Array Description: Six-Tower Array, Night Pattern
11.4.2 Self-Impedance: Six-Tower Array, Night Pattern
11.4.3 Antenna Monitor Readings: Six-Tower Array, Night Pattern
11.4.4 Array Data: Six-Tower Array, Night Pattern
11.4.5 Discussion: Six-Tower Array, Night Pattern
11.4.6 NEC-2 Input File: Six-Tower Array, Night Pattern
11.5 Case Study 4: Tall-Tower Array
11.5.1 Array Description: Tall Towers
11.5.2 Self-Impedance: Tall Towers
11.5.3 Antenna Monitor Reading: Tall Towers
11.5.4 Array Data: Tall Towers
11.5.5 Discussion: Tall Towers
11.5.6 NEC-2 Input File: Tall Towers
CHAPTER 12 Supplemental Topics
12.2 Parallel Feeds: Network Combiners
12.3 New Structures: The NX Command
12.4 Numerical Green's Function
12.6.1 Reflection Coefficient Approximation
12.6.2 Sommerfeld/Norton Analysis
APPENDIX A NEC-2 Input File Statements
2.0 Structure Geometry Commands