Rotating Microwave Filter Connector Assembly for EMC Isolation
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Solution Overview
Problem
Existing microwave filter designs face challenges in achieving compact, robust, and reliable transmit/receive (Tx/Rx) connector port solutions that maintain electromagnetic isolation while reducing overall filter loss and cost, particularly in multi-band, multiple input multiple output (MIMO) radio designs where assembly complexity and passive intermodulation performance are compromised by the use of multiple connectors.
Innovation Solution
A method and arrangement that integrates a threaded connector and seat directly onto the filter chassis, with a soldered input/output coupling, utilizing a tapped blind hole and coupling channel to ensure precise alignment and electromagnetic compatibility through an EMC gasket, allowing for a single-side assembly and reduced component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple connectors are used to provide Tx/Rx port connections in the filter, then electromagnetic isolation is achieved, but cost, reliability, and passive intermodulation performance deteriorate
Solution Approach 1:
The patent combines the connector and coupling structure into a single integrated connector assembly. The connector seat is directly mounted to the filter chassis, and the coupling conductors are soldered directly to the connector pins, eliminating the need for separate internal and external connectors. This integration maintains electromagnetic isolation while reducing component count, cost, and potential failure points.
2Object-affected harmful factors
If multiple connectors are used to provide Tx/Rx port connections in the filter, then electromagnetic isolation is achieved, but device complexity increases
Solution Approach 1:
The connector assembly is integrated as a single unit with the connector seat mounted directly to the chassis and coupling conductors soldered to the pins. This eliminates the complexity of assembling multiple separate connectors and reduces the number of parts, while still providing the necessary electromagnetic isolation through the integrated structure.
3Object-affected harmful factors
If connectors are mounted in the filter lid with blind-mate assembly, then electromagnetic isolation is provided, but manufacturing precision and connector position accuracy deteriorate
Solution Approach 1:
The connector seat is pre-mounted to the filter chassis before the lid is attached. This preliminary mounting establishes precise connector positions directly on the chassis, eliminating the need for blind-mate assembly through the lid. The coupling conductors are then soldered to connect the pre-positioned connector to the cavity resonators, ensuring accurate positioning while maintaining electromagnetic isolation.
4Ease of manufacture
If traditional flat rectangular filter design is used with separate radio enclosure, then assembly is facilitated, but filter volume and overall filter loss are increased
Solution Approach 1:
The connector assembly is integrated directly into the filter chassis structure, combining the filter and radio enclosure functions. The connector seat is mounted on the chassis, and the coupling conductors are soldered to connect the connector to the cavity resonators, eliminating the need for a separate radio enclosure and reducing overall filter volume while maintaining assembly feasibility.
Data Source
AI summary
An apparatus for providing a connector for a microwave filter port is disclosed. According to one aspect, a subassembly includes a connector having a connector pin, a connector seat having a pass through conduit with a first opening for receiving the connector with the connector pin and a second opening at an opposite end of the pass through conduit, the connector pin protruding from the second opening when the connector is mounted to the connector seat. The subassembly further includes a coupling conductor soldered to the connector pin, where the coupling conductor is configured to be soldered to the connector pin before insertion of the subassembly into a channel of the microwave filter port.