Planar Scanner Antenna Orthogonal Dielectric Rotation

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Solution Overview

Problem

Conventional scanning antennas for communication and radar systems are complex, costly, and limited by physical requirements, making them unsuitable for current demands due to the need for numerous electronically controlled active elements and vulnerability to lens loss, interface matching, and drive motor speed control.

Innovation Solution

A planar scanning antenna design utilizing a transducer module and two planar dielectric elements with a mounting structure and drive means for independent positioning, which imparts phase shifts on electromagnetic energy and provides a compact, collimated beam source, suitable for conical scanning and tracking applications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional scanning antennas use numerous electronically controlled active elements for beam steering, then scanning and tracking capabilities are achieved, but device complexity and development costs increase enormously

Engineering Contradiction:

Improvescanning and tracking capabilityVSAvoidnumber of electronically controlled active elements

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the conventional electronic beam steering system with a mechanical phase shifting system. Two planar phase shifting elements are rotated about orthogonal axes to electronically control the beam direction without requiring numerous electronically controlled active elements. The phase shifting is achieved mechanically through rotation of dielectric elements rather than through electronic phase shifters for each antenna element.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the operational parameters by using rotation angles of the two planar phase shifting elements as control parameters instead of individual phase shift values for multiple active elements. By controlling the rotation angles of just two elements, the system achieves the same scanning and tracking capability that would otherwise require control of many more electronic parameters.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If conventional antenna systems are designed to meet current requirements, then scanning performance is improved, but physical requirements impose limitations on antenna geometry and complexity

Engineering Contradiction:

Improvescanning performanceVSAvoidgeometric flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent adds dimensional freedom by introducing rotation about two orthogonal axes. The first planar phase shifting element rotates about a first axis while the second element rotates about a second orthogonal axis, creating a three-dimensional scanning capability from planar elements. This dimensional approach provides geometric flexibility while maintaining scanning performance.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Measurement precision

If conventional scanning antennas use complex electronic control systems, then scanning accuracy is maintained, but ease of operation and control simplicity deteriorate

Engineering Contradiction:

Improvescanning accuracyVSAvoidcontrol simplicity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent simplifies control by changing from controlling multiple electronic parameters (phase shifts for each element) to controlling just two mechanical rotation angles. This parameter reduction maintains scanning accuracy through the orthogonal rotation mechanism while dramatically improving ease of operation and control simplicity.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution enables a compact, efficient, and cost-effective planar scanning antenna capable of independent rotation and phase shifting, improving scanning and tracking capabilities while reducing complexity and physical limitations, allowing for flush mounting in various structures.

Implementation Method 1

planar dielectric elements...configured to impart a phase shift on electromagnetic energy applied to the elements

Methodology Applied

Scientific EffectPhase shifting: Phase Modulation

Implementation Method 2

first planar dielectric element...configured to direct an electromagnetic beam...second planar dielectric element...configured to direct electromagnetic energy

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS7868839B2Planar scanner antenna for high frequency scanning and radar environments

Publication Date: 2011.01.11 CPI SATCOM & ANTENNA TECH INC

AI summary

A planar scanning antenna is configured for scanning and tracking. In one embodiment, the planar scanning antenna may include a transducer module configured to provide an electromagnetic beam. According to another aspect of the invention, the apparatus may include a first planar dielectric element having an axis of rotation and configured to direct an electromagnetic beam. In one embodiment, a second planar dielectric element oriented adjacent to the first planar dielectric element and having the axis of rotation may be configured to direct electromagnetic energy. The apparatus may further include a mounting structure arranging the transducer module and the first and second planar dielectric elements. In yet another embodiment, the apparatus may include a drive means for positioning the first planar dielectric element independently from the second planar dielectric element.