Terahertz Oscillator Wiring Layout for Uniform Antenna Drive
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Solution Overview
Problem
In oscillating elements for terahertz waves, variations in wiring resistance among antennas lead to deviations in oscillation frequency, resulting in insufficient output when synthesizing electromagnetic waves, due to inconsistent drive voltages and wiring lengths.
Innovation Solution
The implementation of a common wiring system with individual wirings from the power supply pad to each antenna, where the resistivity, sectional area, and length of each wiring differ based on the antenna's position to match wiring resistances and reduce deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If antennas are connected to each other by microstrip lines to realize phase synchronization, then output is increased, but wiring resistance values differ among antennas causing deviation in drive voltage
Solution Approach 1:
The patent applies local quality by making each individual wiring from the common wiring to each antenna have different sectional areas, resistivities, or lengths according to the antenna's position on the substrate. This localized customization of wiring parameters compensates for position-dependent resistance variations, ensuring that each antenna receives consistent drive voltage despite being at different distances from the power supply pad.
2Reliability
If drive voltage changes among antennas, then oscillation frequency changes, but this causes insufficient output when synthesizing electromagnetic waves
Solution Approach 1:
The patent employs parameter changes by adjusting the sectional area, resistivity, or length of individual wirings to compensate for position-dependent resistance variations. By changing these wiring parameters locally, the patent maintains consistent drive voltage across all antennas, which in turn maintains consistent oscillation frequency and enables effective synthesis of electromagnetic waves for increased output.
3Ease of manufacture
If wiring length varies among antennas based on position, then connection is achieved, but wiring resistance difference arises reducing power distribution efficiency
Solution Approach 1:
The patent applies local quality by customizing the sectional area, resistivity, or length of individual wirings according to each antenna's position. This localized adjustment compensates for the inherent wiring resistance differences caused by varying lengths, ensuring efficient and consistent power distribution to all antennas in the array despite their different positions relative to the power supply pad.
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 approach ensures consistent drive voltages and oscillation frequencies across antennas, enhancing the output of synthesized electromagnetic waves by minimizing resistance differences and optimizing power distribution.
Implementation Method 1
each of the individual wirings differ from each other with respect to at least one of a sectional area, resistivity, and a length in accordance with a position on the substrate of an antenna connected to each wiring so as to reduce a difference in wiring resistances
Implementation Method 2
Structures which integrate a negative resistance element and a resonator and which have an electromagnetic gain in the terahertz region such as a resonant tunneling diode (RTD) and a Gunn diode
Implementation Method 3
a plurality of antennas which are electrically connected one-to-one to each of the plurality of negative resistance elements and which transmit or receive an electromagnetic wave
Data Source
AI summary
An oscillating element includes a substrate, negative resistance elements which are electrically connected to the substrate, antennas which are electrically connected one-to-one to each negative resistance element and which transmit or receive an electromagnetic wave, a pad electrically connected to a power supply source for supplying power to the antennas, and a conductor which electrically connects the pad and the antennas to each other. The conductor is constituted of a common wiring that is common to the antennas and individual wirings from the common wiring to each antenna. The individual wirings differ from each other with respect to a sectional area, resistivity, and a length in accordance with a position on the substrate of an antenna connected to each wiring to reduce a difference in wiring resistances caused based on a distance between the antenna connected to each wiring and the pad.