Power Combiner/Divider Topology for Wide Isolation Bandwidth
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Solution Overview
Problem
Conventional power combiner/divider circuits face challenges in achieving low insertion loss and wide bandwidth while maintaining a compact size, which is essential for efficient signal processing in microwave and millimeter wave systems.
Innovation Solution
The proposed solution involves structuring power combiner/divider circuits with an odd-mode capacitor and a low pass network, or an inductor and a high pass network, at the ends of the base structure, allowing for pair-wise positive coupling of inductors and capacitors to enhance isolation bandwidth and reduce insertion loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional power combiner/divider circuits are designed to achieve wide bandwidth, then isolation bandwidth is improved, but insertion loss increases and device size expands
Solution Approach 1:
The circuit is divided into a base Wilkinson power combiner/divider structure and additional filtering stages. The low pass network or high pass network is added as a separate segment to the base structure, allowing independent optimization of each part for bandwidth and loss characteristics
Solution Approach 2:
The patent modifies circuit parameters by adding odd-mode capacitors and configuring inductors in specific arrangements (pair-wise positive coupling for low pass, pair-wise negative coupling for high pass). These parameter changes enable simultaneous achievement of wide isolation bandwidth and reduced insertion loss
2Adaptability or versatility
If conventional power combiner/divider circuits are designed to achieve wide bandwidth, then isolation bandwidth is improved, but device size expands
Solution Approach 1:
The filtering function is segmented into separate low pass or high pass networks added to the base combiner/divider structure. This modular approach allows compact integration while achieving wide bandwidth through the combined functionality of the segmented stages
Solution Approach 2:
The patent extends the basic two-port Wilkinson structure by adding filtering dimensions through low pass or high pass networks. This dimensional extension in the circuit topology enables simultaneous achievement of compact size and wide isolation bandwidth
3Volume of moving object
If inductor values are reduced to minimize device size, then device size is reduced, but isolation bandwidth narrows
Solution Approach 1:
The patent changes the circuit configuration by adding odd-mode capacitors and arranging inductors in pair-wise coupling configurations. These parameter changes allow small inductor values to achieve both compact size and wide isolation bandwidth through the enhanced filtering action of the additional capacitor-inductor arrangements
Solution Approach 2:
The circuit uses a composite structure combining the base Wilkinson topology with additional low pass or high pass filtering stages. This composite circuit architecture enables small component values to deliver both compact size and wide bandwidth performance
Data Source
AI summary
A power combiner/divider circuit can be structured having a base structure with the addition of an odd-mode capacitor and a low pass network at an end of the base structure or structured having a base structure with the addition of an inductor and a high pass network at an end of the base structure. The power combiner/divider circuit can be implemented as a port coupled to multiple ports with low pass networks or high pass networks arranged at the ends of paths to the multiple ports. In embodiments using low pass base structures or low pass networks coupled to the base structures, inductors in such low pass sections can be positively coupled on a pair-wise basis.