Microstrip DC Block Layout for High-Frequency Power Isolation
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Solution Overview
Problem
Conventional DC blocks are large and unable to efficiently handle the combination of high-frequency low power and direct-current high voltage, particularly in applications requiring significant size reduction such as small spacecraft engines.
Innovation Solution
A DC block configuration using two high-frequency power transmission antennas formed on microstrip lines, facing each other with an insulating sheet in between, to transmit high-frequency power efficiently while blocking direct-current power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional coaxial or waveguide designs are used for DC block, then high-frequency power transmission and direct-current power blocking functions are achieved, but the device size becomes large
Solution Approach 1:
The DC block is segmented into two separate functional components: a high-frequency power transmission path using microstrip line antennas, and a direct-current power blocking path using an insulating sheet. This segmentation allows each component to be optimized independently, enabling compact size while maintaining reliable power transmission and blocking functions.
Solution Approach 2:
An insulating sheet is introduced as an intermediary component between the high-frequency power transmission antennas. This insulating sheet serves dual purposes: it blocks direct-current power while allowing high-frequency power to pass through the microstrip line antennas, thereby resolving the contradiction between compact size and reliable power function separation.
2Volume of moving object
If DC block size is reduced for small spacecraft engines, then space efficiency is improved, but handling the combination of high-frequency low power and direct-current high voltage becomes difficult
Solution Approach 1:
The microstrip line antennas are designed with specific local geometric characteristics (strip width, length, and spacing) that are locally optimized to handle the combination of high-frequency low power and direct-current high voltage. This local quality optimization enables the compact DC block to adapt to the specific power requirements of small spacecraft engines.
Solution Approach 2:
The design parameters of the microstrip line antennas (such as strip width, length, spacing, and insulation thickness) are carefully adjusted to achieve the desired performance. By changing these parameters, the DC block can handle different combinations of high-frequency power and direct-current voltage while maintaining a compact size suitable for small spacecraft engines.
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 configuration allows for a reduced-size DC block capable of handling high-frequency low power and direct-current high voltage, achieving efficient transmission and size reduction compared to conventional coaxial or waveguide designs.
Implementation Method 1
two open ring-shaped resonators formed on different planes are disposed to face each other to enable direct-current power or a low-frequency signal to be transmitted, and the resonators are electromagnetically coupled to each other to enable a high-frequency signal to be transmitted
Data Source
AI summary
A configuration is provided in which two high-frequency power transmission antennas 111, 121 formed on two microstrip lines 101, 102, respectively, are disposed to face each other with an insulating sheet 103 interposed between the two high-frequency power, and the high-frequency power transmission antennas 111, 121 are formed on the two microstrip lines 101, 102, respectively, to realize transmission of high-frequency power, to make it possible to reduce the size of a DC block as compared with a conventional DC block using a coaxial line shape or a waveguide shape, and make it possible to highly efficiently transmit only high-frequency power while cutting off high-voltage direct-current power by the insulating sheet 103.