Wilkinson Distribution Circuit for Wideband Low-Frequency Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional Wilkinson-type distribution circuits face challenges in achieving adequate isolation characteristics on the low frequency side within the wide band of 1032 MHz to 3224 MHz, leading to increased component count, cost, and mounting area, while cascading stages does not sufficiently meet the required isolation characteristics.
Innovation Solution
The proposed solution involves cascading Wilkinson-type distribution circuits with coils, capacitors, and resistors in two stages between input and output terminals, with capacitors connected in parallel with resistors between output terminals in the latter-stage circuits, and using resistors in series between signal systems to enhance isolation characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Wilkinson-type distribution circuits are cascaded in multiple stages to improve isolation characteristic, then isolation characteristic is improved, but the number of components increases, cost increases, and component mounting area increases
Solution Approach 1:
The patent changes the electrical parameters of the circuit by introducing a capacitor in parallel with the isolation resistor in the second stage Wilkinson circuit. This parameter modification allows the circuit to achieve improved isolation characteristic (20 dB or more) without requiring multiple cascaded stages, thereby reducing the number of components while maintaining the desired isolation performance.
2Reliability
If Wilkinson-type distribution circuits are cascaded in multiple stages to improve isolation characteristic, then isolation characteristic is improved, but cost increases
Solution Approach 1:
By modifying the circuit parameters through the addition of a capacitor in parallel with the isolation resistor, the patent achieves the required isolation characteristic with a single stage rather than multiple cascaded stages. This reduces the total component count and associated manufacturing costs while meeting the isolation performance requirements.
3Reliability
If Wilkinson-type distribution circuits are cascaded in multiple stages to improve isolation characteristic, then isolation characteristic is improved, but component mounting area increases
Solution Approach 1:
The patent achieves improved isolation characteristic by changing the circuit parameters through the addition of a capacitor in parallel with the isolation resistor in the second stage. This approach accomplishes the isolation improvement within a single distribution circuit stage, thereby minimizing the component mounting area compared to multiple cascaded stages.
4Reliability
If conventional Wilkinson-type distribution circuit is used, then pass characteristic is maintained, but isolation characteristic on low frequency side cannot be realized
Solution Approach 1:
The patent modifies the conventional Wilkinson circuit parameters by adding a capacitor in parallel with the isolation resistor in the second stage. This parameter change enables the circuit to achieve 20 dB or more isolation characteristic across the wide frequency band of 1032 MHz to 3224 MHz, including the low frequency side, while maintaining compatibility with both conventional and 4K/8K satellite broadcasting bands.
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 effectively improves the isolation characteristic on the low frequency side while maintaining a good pass characteristic, reducing the number of components and costs, and allowing for versatile distribution circuit configurations such as two-way, three-way, or four-way distribution.
Implementation Method 1
a capacitor and a resistor are connected in parallel between a second terminal and a third terminal
Implementation Method 2
Wilkinson-type distribution circuits configured with the coil, the capacitor, and the resistor are cascaded in two stages between the first terminal, the second terminal, and the third terminal
Data Source
AI summary
Provided is a distribution circuit which has good pass characteristic and isolation characteristic over a wide band. A distribution circuit, in which Wilkinson-type distribution circuits configured with a coil, a capacitor, and a resistor are cascaded in two stages between an input terminal and at least three terminals, and a capacitor is connected in parallel with the resistor inserted between the output terminals in the latter-stage Wilkinson-type distribution circuits.