Oscillation Element Negative Resistance Phase Synchronization

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Solution Overview

Problem

Oscillation output of electromagnetic wave elements decreases with increasing frequency due to miniaturization of negative resistance element junction areas, leading to synchronization issues among multiple negative resistance elements, resulting in deteriorated oscillation performance.

Innovation Solution

The oscillation element consists of multiple negative resistance elements electrically connected in series and parallel, disposed to oscillate with the same or opposite phase, allowing synchronization of electromagnetic waves and improving oscillation output.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the junction area of negative resistance elements is reduced to increase cutoff frequency, then the cutoff frequency is improved, but the power supply capability deteriorates

Engineering Contradiction:

Improvecutoff frequencyVSAvoidpower supply capability

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The invention divides a single large negative resistance element into multiple smaller negative resistance elements with smaller junction areas. Each small element has a high cutoff frequency due to its small junction area, while the collective array of multiple elements provides sufficient power supply capability through parallel operation. This segmentation resolves the contradiction between achieving high cutoff frequency and maintaining power supply capability.

Inventive Principle:

Principle #1Segmentation

2Use of energy by moving object

If multiple negative resistance elements are arrayed in a straight line to increase power supply, then the power supply capability is improved, but phase synchronization deteriorates

Engineering Contradiction:

Improvepower supply capabilityVSAvoidphase synchronization

Core Design Contradiction:

Use of energy by moving objectVSStability of the object's composition

Solution Approach 1:

The invention positions negative resistance elements at specific locations on the antenna where the electromagnetic field phases are naturally aligned. Rather than uniformly distributing elements along a straight line, each element is placed at a local position that ensures phase coherence with neighboring elements. This local quality approach maintains phase synchronization while achieving the desired power supply capability through multiple elements.

Inventive Principle:

Principle #3Local quality

3Use of energy by moving object

If multiple negative resistance elements are disposed with common interval in the center of antenna to increase power, then the power supply capability is improved, but oscillation output deteriorates due to frequency and phase mixing

Engineering Contradiction:

Improvepower supply capabilityVSAvoidoscillation output

Core Design Contradiction:

Use of energy by moving objectVSPower

Solution Approach 1:

The invention employs non-uniform spacing of negative resistance elements based on their specific positions on the antenna structure. Elements are disposed at locations where the electromagnetic field characteristics ensure phase alignment, rather than using a uniform common interval. This localized positioning strategy ensures that all elements oscillate at the same frequency and phase, preventing frequency and phase mixing while maintaining adequate power supply capability.

Inventive Principle:

Principle #3Local quality

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

This configuration enhances oscillation output by ensuring all negative resistance elements oscillate with a common frequency and phase, effectively increasing the oscillation frequency range and power supply while maintaining conversion efficiency.

Implementation Method 1

multiple negative resistance elements electrically serially connected to the antenna, and also connected to each other in parallel

Methodology Applied

Scientific EffectNegative resistance effect:

Implementation Method 2

configured to oscillate electromagnetic waves

Methodology Applied

Scientific EffectElectromagnetic oscillation:

Implementation Method 3

an antenna configured to guide electromagnetic waves

Methodology Applied

Scientific EffectElectromagnetic wave guidance: Waveguide

Implementation Method 4

a negative resistance element such as a resonant tunneling diode or the like forms a RC low-pass filter function made up of a junction capacitor Cj and a serial resistor Rs

Methodology Applied

Scientific EffectRC low-pass filter effect: Filter (electronic)

Implementation Method 5

a junction capacitor Cj and a serial resistor Rs equivalent to resistance from the negative resistance element to a resonator

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 6

a serial resistor Rs equivalent to resistance from the negative resistance element to a resonator

Methodology Applied

Scientific EffectElectrical resistance: Electrical Resistance

Data Source

PatentUS9197156B2Oscillation element, oscillator, and imaging apparatus using the same

Publication Date: 2015.11.24 CANON KK

AI summary

An oscillation element includes an antenna for oscillation configured to oscillate electromagnetic waves, and multiple negative resistance elements electrically connected to the antenna in parallel, and the multiple negative resistance elements are disposed in only a place where the phases of electromagnetic waves oscillated therefrom are the common phase or opposite phase.