Mechanically Tuned Antenna Unit for Temperature-Stable Beam Steering
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Solution Overview
Problem
Conventional antenna parameter adjustment methods, such as analog and digital phase shifters, are either expensive to produce or susceptible to interference and temperature variations, making them unsuitable for various applications like vehicles.
Innovation Solution
An antenna unit with an electromechanical actuator on a support substrate that mechanically deforms to adjust the distance between antenna elements, allowing for precise control of antenna parameters like main focus direction, using a control circuit to generate signals based on target values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If analog phase shifters are used to control antenna directionality, then the antenna parameter adjustment is achieved, but the manufacturing cost increases and temperature stability deteriorates
Solution Approach 1:
The patent replaces the mechanical/electrical phase shifter system with a mechanically actuated antenna element positioning system. An electromechanical actuator physically moves the antenna element to change the main focus direction, eliminating the need for phase shifters and their associated temperature stability issues while maintaining cost-effectiveness.
Solution Approach 2:
The patent changes the physical position parameter of the antenna element rather than changing the electrical phase parameter. By mechanically adjusting the distance between antenna elements, the system achieves directionality control through geometric parameter change instead of electrical phase manipulation, avoiding temperature-related drift.
2Object-affected harmful factors
If digital methods are used to evaluate signals arithmetically, then the main receiving direction can be influenced, but each antenna must cover the entire measurement field which increases susceptibility to external interference
Solution Approach 1:
The patent replaces digital signal processing methods with a mechanical positioning system. The electromechanical actuator physically adjusts the antenna element position to steer the beam, eliminating the need for complex digital evaluation of signals from multiple antennas covering the entire field, thereby reducing susceptibility to external transmitters.
3Measurement precision
If electromechanical actuators are used to mechanically deform the support substrate, then the antenna parameter control precision is improved and temperature stability is enhanced, but the device complexity increases
Solution Approach 1:
The patent uses a straightforward electromechanical actuator system to directly position antenna elements, replacing complex phase shifter networks or digital signal processing systems. The mechanical positioning provides precise control of antenna parameters through direct physical adjustment, achieving high precision with relatively simple implementation.
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 solution provides a cost-effective and robust method to adjust antenna parameters, compensating for temperature effects and reducing interference, enabling precise control of antenna directionality and angular resolution without the need for expensive phase shifters.
Implementation Method 1
an electromechanical actuator that is arranged on the support substrate and configured to take a control signal as a basis for mechanically deforming the support substrate along a spatial direction
Data Source
AI summary
An antenna unit includes an antenna having at least two elements for emitting and/or receiving electromagnetic radiation. The antenna is arranged on a support substrate. Furthermore, the antenna unit includes an electromechanical actuator that is arranged on the support substrate and configured to take a control signal as a basis for mechanically deforming the support substrate along a spatial direction in order to adjust a distance between the at least two elements of the antenna along the spatial direction for the purpose of influencing an antenna parameter of the antenna. The antenna unit also includes a control circuit configured to generate the control signal based on a target value for the antenna parameter.