COBHAM Defense Electronic Systems

Design Aids

This section provides general antenna and radome selection information, data on various conventional antenna types, typical performance characteristics, as well as several frequently used reference engineering tables and calculations. This information has specific relevance to Electronic Warfare (EW) and Communication, Navigation and Identification (CNI) applications.

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Antenna Related

Antenna/Radome Selection Guide

• Page 1 (.pdf - 162KB)
• Page 2 (.pdf - 155KB)

Antenna Types and Characteristics

• Quarter-Wave Monopole/Dipole/Cross Dipole/Log Periodics (.pdf - 480KB)
• Biconical/Biconical with Polarizer/Cavity Backed Spiral/Conical Spiral (.pdf - 590KB)
• 4-Arm Conical Spiral/Multi Element Array/Slotted Waveguide/Surface Wave (.pdf - 522KB)
• Linear Horn/Dual Linear Horn/C.P. Horn/Reflector (.pdf - 570KB)
• Antenna Polarizations and Mismatch Loss (.pdf - 309KB)
• Effect of VSWR on Transmitted Power Graph (.pdf - 153KB)
• Optimum Gain Design Graph (.pdf - 182KB)

Radome Related

• Dielectric Constant, Loss Tangent and Temperature Range of Typical Radome Materials (.pdf - 192KB)

Conversion Tables

• Gain Correction Factor to convert from dBiL to dBiC (.pdf - 152KB)
• Conversion of Power Ratio to dB (.pdf - 130KB)
• Conversion of Power (DBM to Watts) (.pdf - 138KB)
• Conversion of Power (Watts to DBM) (.pdf - 148KB)
• Temperature Conversion Table (.pdf - 133KB)
• Absolute Pressure Conversions Table (.pdf - 111KB)
• Frequency Band Designation (.pdf - 128KB)

Equations

• Equations for Polarization Mismatch Loss (.pdf - 165KB)
• Linear Horn Gain versus Half Power Beamwidth Approximation Graph (.pdf - 226KB)

Waveguide Related

• Rectangular Waveguide Specifications (.pdf - 150KB)
• Double Ridge Waveguide Specifications (.pdf - 128KB)

Miscellaneous

• Pressure and Temperature Values for Various Altitudes (.pdf - 133KB)

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