Active Antenna Phase Control for Low-Noise Terahertz Oscillation
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Solution Overview
Problem
Existing antenna systems suffer from phase noise issues, which affect the performance of oscillators used in generating terahertz waves.
Innovation Solution
An antenna apparatus is designed with an active antenna comprising a semiconductor structure and power lines to generate or detect electromagnetic waves, and a control line to control the phase of the oscillator, utilizing a master oscillator to synchronize active antennas and reduce phase noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If coupling lines are used to mutually couple multiple active antennas, then the active antennas can oscillate in the same phase in synchronism, but phase noise of the oscillator increases
Solution Approach 1:
A master oscillator is introduced as an intermediary device to generate a reference signal that is distributed to multiple active antennas via control lines. This master oscillator acts as a mediator that synchronizes the phase of all active antennas while providing a stable reference that reduces overall phase noise in the system.
Solution Approach 2:
The system is divided into a master oscillator unit and multiple slave active antenna units. The master oscillator handles the critical function of phase reference generation, while the active antennas focus on electromagnetic wave generation and detection. This segmentation allows optimization of each component's function and reduces phase noise propagation.
2Productivity
If multiple active antennas are arranged on the same substrate, then the antenna array can generate terahertz waves, but phase noise affects the oscillator performance
Solution Approach 1:
The system implements feedback control by using the master oscillator to continuously provide reference signals to the active antennas. This feedback mechanism ensures that phase deviations are corrected, maintaining synchronization and reducing the impact of phase noise on terahertz wave generation performance.
Solution Approach 2:
The master oscillator serves as an intermediary that decouples the phase noise issues from the active antennas. By introducing this intermediate reference source, the system can maintain high productivity in terahertz wave generation while the master oscillator absorbs and manages the phase noise through its stable reference signal distribution.
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 design improves phase accuracy and reduces phase noise, enabling synchronized terahertz wave generation and detection with enhanced performance.
Implementation Method 1
an oscillator formed by integrating a Resonance Tunneling Diode (RTD) and an antenna is expected as an element that operates at room temperature in a frequency domain around 1 THz
Implementation Method 2
a control line electrically connected to one of the at least two power lines and configured to be injected with a signal for controlling a phase of the oscillator
Data Source
AI summary
An antenna apparatus that comprises an active antenna including an antenna, a semiconductor structure configured to operate as an oscillator, and at least two power lines configured to give a potential difference to the semiconductor structure, and configured to generate or detect an electromagnetic wave, and a control line electrically connected to one of the at least two power lines and configured to be injected with a signal for controlling a phase of the oscillator in the active antenna is provided.