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Related Experiment Video

Updated: Jun 16, 2026

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

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Optical antenna gain. 1: transmitting antennas.

B J Klein, J J Degnan

|February 6, 2010

Summary

This summary is machine-generated.

This study analyzes optical transmitting antennas with central obscuration, providing gain patterns and design curves. It offers a method to accurately evaluate antenna gain, considering pointing errors and beam characteristics.

Related Experiment Videos

Last Updated: Jun 16, 2026

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

Area of Science:

Optical engineering
Antenna theory
Electromagnetics

Background:

Optical transmitting antennas are crucial for directed energy and communication systems.
Central obscurations in antennas can affect performance but may offer design advantages.
Accurate gain prediction is essential for system performance modeling.

Purpose of the Study:

To analyze the gain of optical transmitting antennas with central obscurations.
To develop a method for predicting antenna gain patterns and losses.
To provide design curves for optimizing antenna performance.

Main Methods:

Detailed analysis of near- and far-field antenna gain patterns.
Derivation of a polynomial equation for matching source distribution to antenna configuration.
Development of auxiliary design curves based on gain calculations.

Main Results:

Calculated antenna gain patterns for a circular antenna illuminated by a TEM(00) laser mode.
Derived equations for maximum on-axis gain and identified losses due to pointing errors and beam cone angle.
Presented results in graphs for rapid and accurate antenna gain evaluation.

Conclusions:

The study provides a framework for understanding and calculating the gain of centrally obscured optical antennas.
The derived equations and design curves facilitate efficient antenna design and performance prediction.
The results can be integrated into conventional range equations for system-level analysis.