Differential Phase Shifter Layout Without Delay Lines

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Solution Overview

Problem

Existing phase shifters with right-hand transmission characteristics require long delay lines to achieve phase balance, leading to increased wiring complexity and loss in phase control electronically scanned array antennas.

Innovation Solution

A phase shifter design incorporating a plurality of phase shift units with conductive structures that include inductive and capacitive elements, allowing for a left-hand transmission characteristic, which reduces signal delay and eliminates the need for additional delay lines, thereby simplifying the design and reducing losses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If right-hand transmission characteristic phase shifters are used, then phase control is achieved, but wiring length and complexity increase

Engineering Contradiction:

Improvephase control capabilityVSAvoidwiring length

Core Design Contradiction:

Ease of operationVSLength of stationary object

Solution Approach 1:

The patent inverts the conventional right-hand transmission characteristic to implement a left-hand transmission characteristic phase shifter. By reversing the transmission characteristic, the phase shift function is achieved without requiring additional delay lines, thereby reducing wiring length and complexity while maintaining phase control capability

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent extracts and removes the unnecessary delay line component from the conventional phase shifter design. By taking out the delay line that is required in right-hand transmission characteristic designs, the wiring complexity and length are reduced while the phase control function is maintained through the left-hand transmission characteristic

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If delay lines are added to achieve phase balance, then phase control is improved, but signal loss increases

Engineering Contradiction:

Improvephase balanceVSAvoidsignal loss

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

By inverting the transmission characteristic from right-hand to left-hand, the patent eliminates the need for additional delay lines to achieve phase balance. This inversion allows the signal to traverse a shorter path while maintaining proper phase relationships, thereby reducing signal loss

Inventive Principle:

Principle #13The other way round (Inversion)

3Ease of operation

If conventional phase shifter design is used, then phase control is achieved, but device complexity increases

Engineering Contradiction:

Improvephase control functionVSAvoiddesign complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent simplifies the device design by inverting the transmission characteristic, which eliminates the need for complex delay line configurations and additional components. This approach maintains the essential phase control function while significantly reducing design complexity

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

By extracting and removing the delay line component from the conventional design, the patent reduces device complexity while maintaining phase control functionality through the left-hand transmission characteristic approach

Inventive Principle:

Principle #2Taking out (Extraction)

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 proposed phase shifter design achieves phase balance with reduced signal delay and wiring length, enhancing the efficiency and reducing overall loss in phase control electronically scanned array antennas.

Implementation Method 1

Each third transmission line is configured to form a capacitor with a first transmission line

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 2

The second transmission line is configured as an inductive load

Methodology Applied

Scientific EffectInductance: Inductor

Data Source

PatentUS12482912B2Phase shifter operable in a differential mode comprising a first conductive structure and a second conductive structure that form a capacitor therebetween

Publication Date: 2025.11.25 BEIJING BOE SENSOR TECH CO LTD

AI summary

A phase shifter is provided. The phase shifter includes a plurality of phase shift units coupled in sequence. At least one phase shift unit of the plurality of phase shift units includes: a first conductive structure and a second conductive structure. The first conductive structure includes at least one first transmission line, and a second transmission line connected to the at least one first transmission line, the second transmission line being configured as an inductive load. The second conductive structure includes at least one third transmission line, each third transmission line being configured to form a capacitor with a first transmission line. The first transmission line, the third transmission line and the capacitor constitute at least a portion of a phase shift communication path of the phase shifter.