Radar Antenna Terminal Layout for Shorter Feed Lines
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Solution Overview
Problem
Existing radar technologies face signal loss issues due to long transmission lines between antennas, which can increase the size and complexity of the devices and reduce their effectiveness in measuring distances and detecting objects efficiently.
Innovation Solution
The electronic device incorporates a configuration with shortened transmission lines between antennas, utilizing an electronic component with transmission and reception terminals arranged in a way that allows for phase control to minimize signal loss, enabling efficient detection of objects by reducing the length of transmission lines and enhancing directivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If multiple patch antennas are connected in parallel by transmission lines all having an equal length, then the directivity of transmission waves in a front direction is enhanced, but the transmission lines become long which causes signal loss
Solution Approach 1:
The patent applies asymmetry by making the transmission lines have different lengths instead of equal lengths. Specifically, the transmission lines are designed with progressively increasing lengths (L1 < L2 < L3 < L4) to compensate for phase differences and maintain signal coherence at the antennas, thereby reducing signal loss while preserving directivity enhancement.
2Loss of energy
If transmission lines are shortened to reduce signal loss, then device size and complexity are reduced, but the ability to enhance directivity and control radiation direction is compromised
Solution Approach 1:
The patent uses asymmetric transmission line lengths designed according to specific formulas (L_n = L_0 + (n-1)×ΔL where n is the antenna index) to maintain phase relationships necessary for directivity control. This asymmetric design allows shorter overall line lengths compared to equal-length designs while preserving the ability to control radiation patterns and enhance front-direction directivity.
3Adaptability or versatility
If patch antennas are arranged with intervals of nλ to adjust radiation direction using tilt angle changes, then the radiation direction can be controlled, but the device size increases
Solution Approach 1:
The patent applies parameter changes by systematically varying the transmission line lengths (L1, L2, L3, L4) to adjust the phase relationships between antenna elements. This allows control over radiation direction and tilt angles without requiring large physical spacing between antennas, thereby achieving direction control while maintaining a compact device footprint.
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 reduces signal loss, allows for a more compact design, and improves the accuracy and efficiency of distance measurement and object detection, particularly in automotive and mobility applications.
Implementation Method 1
a plurality of transmission antennas 26, a plurality of reception antennas 31, Each of the plurality of transmission antennas 26 transmits a transmission wave T. Each of the plurality of reception antennas 31 receives a reflected wave R that is the transmission wave T having been reflected
Data Source
AI summary
An electronic device includes transmission antennas, reception antennas, and an electronic component. The transmission antennas each transmit a transmission wave. The reception antennas each receive a reflected wave that is the transmission wave having been reflected. The electronic component outputs respective transmission signals to the transmission antennas and receive respective reception signals from the reception antennas. The electronic component has a first edge where transmission terminals that output the respective transmission signals to the transmission antennas are arranged, and a second edge where reception terminals that receive the respective reception signals from the reception antennas are arranged. At least one of the first edge or the second edge is located obliquely relative to at least one of a direction in which respective feeding points of the transmission antennas are arranged or a direction in which respective feeding points of the reception antennas are arranged.