Radar Apparatus Printed Board Segmentation for Dielectric Loss
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Solution Overview
Problem
Conventional radar apparatus configurations that integrate all sections on a single printed board require special insulating materials to suppress dielectric loss at high frequencies, increasing manufacturing costs and limiting the use of high-frequency signals.
Innovation Solution
The radar apparatus is configured with a main printed board for the low-frequency circuit section and a secondary printed board for the high-frequency circuit section and antenna section, allowing the use of special insulating materials only on the smaller secondary board, thereby reducing manufacturing costs and enabling the use of high-frequency signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all circuit sections are integrated on a single printed board, then manufacturing complexity is reduced, but dielectric loss increases at high frequencies requiring expensive special insulating materials
Solution Approach 1:
The radar apparatus divides the printed board into two separate boards: a first printed board for the antenna section and high-frequency circuit section, and a second printed board for the low-frequency circuit section. This segmentation allows the first board to use expensive special insulating materials with low dielectric dissipation factors to minimize dielectric loss at high frequencies, while the second board can use conventional, cheaper materials for low-frequency processing, thus resolving the contradiction between integration simplicity and energy loss.
Solution Approach 2:
The patent applies different insulating material qualities to different regions of the system: the first printed board handling high-frequency signals uses special insulating materials with low dielectric dissipation factors, while the second printed board handling low-frequency signals uses conventional materials. This local differentiation of material quality optimizes performance where needed while controlling overall cost, resolving the contradiction between minimizing dielectric loss and managing manufacturing complexity.
2Loss of energy
If special insulating materials are used throughout the entire printed board, then dielectric loss is suppressed, but manufacturing cost increases
Solution Approach 1:
By segmenting the printed board into two separate boards with different material requirements, the patent limits the use of expensive special insulating materials to only the first board where high-frequency signals are processed. The second board uses conventional, cheaper materials, thereby suppressing dielectric loss where critical while reducing overall manufacturing cost.
Solution Approach 2:
The patent applies high-quality special insulating materials locally only to the first printed board that handles high-frequency signals, while using lower-cost conventional materials for the second printed board handling low-frequency signals. This localized application of high-quality materials suppresses dielectric loss in the critical high-frequency path without unnecessarily increasing manufacturing costs throughout the entire apparatus.
3Measurement precision
If high-frequency signals are used to improve directivity and detection range, then detection performance improves, but dielectric loss increases requiring special materials
Solution Approach 1:
The patent segments the signal processing into high-frequency and low-frequency paths on separate printed boards. The first board is dedicated to high-frequency signal generation and transmission, using special insulating materials to minimize dielectric loss and enable improved directivity and detection range. This segmentation allows high-frequency operation for better performance without forcing the entire system to use expensive materials.
Solution Approach 2:
The patent applies special insulating materials with low dielectric dissipation factors locally to the first printed board where high-frequency signals are generated and transmitted, enabling improved directivity and detection range. The materials are applied only where high-frequency signals are present, suppressing dielectric loss in the critical path while allowing conventional materials elsewhere, thus achieving better detection performance without excessive cost.
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 allows the use of high-frequency signals while maintaining a conventional printed board setup, reducing manufacturing costs and extending the detection range by shortening antenna length and improving directivity.
Implementation Method 1
a transmitting antenna 18 that transmits a radar wave (an electromagnetic wave) responding to a high-frequency signal
Implementation Method 2
a receiving antenna 20 that receives a reflected wave, which is produced by reflection of the radar wave by a target, and outputs a reception signal responding to the reflected wave
Implementation Method 3
a mixer 21 that mixes a reception signal outputted from the receiving antenna 20 with the high-frequency signal and extracts a frequency component equal to the difference between the frequencies of the two signals
Data Source
AI summary
A radar apparatus includes an antenna section that transmits and receives a radar wave, a high-frequency circuit section that handles a high-frequency signal, and a low-frequency circuit section that handles a low-frequency signal. The low-frequency circuit section is arranged on a major face of a main printed board. The high-frequency circuit section and the antenna section are arranged respectively on first and second faces of a secondary printed board. Moreover, the secondary printed board is mounted to a space on the major face of the main printed board which is not occupied by the low-frequency circuit section. Consequently, it becomes possible to use the high-frequency signal by using an insulating material, which is necessary for suppression of dielectric loss, only for the secondary printed board.