Transceiver Filter Switching for Low-Loss Interference Control
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Solution Overview
Problem
Existing transceiver systems face interference from external signals, which are typically addressed using duplexers or diplexers that introduce insertion loss and increase complexity, cost, and physical size, while splitting TX and RX paths requires additional infrastructure.
Innovation Solution
A transceiver system with a filter switch assembly allows selective filtering in the RX or TX path without affecting the other path, using external filters connected via separate ports, and controlled by a controller to toggle between filtered and unfiltered paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If duplexers or diplexers are used to attenuate interfering signals, then signal interference is reduced, but insertion loss increases and device complexity increases
Solution Approach 1:
The patent extracts the filtering function from the main transceiver signal path by providing external filter ports that allow filters to be connected outside the housing. This separates the interference attenuation function from the core transceiver unit, reducing internal device complexity while still achieving signal interference reduction through externally connected filters.
Solution Approach 2:
The patent introduces filter ports as intermediary connection points between the transceiver and external filters. These ports serve as mediators that enable external filtering without requiring complex internal filter integration, thus reducing device complexity while maintaining interference attenuation capability.
2Object-affected harmful factors
If duplexers or diplexers are used to attenuate interfering signals, then signal interference is reduced, but insertion loss increases
Solution Approach 1:
By extracting the filtering function to external components connected through dedicated filter ports, the patent allows selection of filters with lower insertion loss compared to integrated duplexer/diplexer solutions. The external filters can be optimized for specific frequency ranges, reducing energy loss in the signal path.
3Adaptability or versatility
If TX and RX paths are split, then filtering flexibility is improved, but additional infrastructure is required
Solution Approach 1:
The patent provides filter ports that can be used for both TX and RX paths, allowing a single external filter to serve multiple functions. This universal interface design enables filtering flexibility without requiring separate infrastructure for each path, as the same filter ports and external filters can be shared across transmit and receive operations.
Data Source
AI summary
A transceiver system may include a transmitter, a receiver, an antenna port that is connectable to the transmitter or to the receiver, a filter send port, and a filter return port. The filter ports may be antenna-side or receiver-side, and connectable across at least one filter between the antenna port and the receiver. A transceiver apparatus may include a housing including the transmitter, the receiver, a transceiver switch, and a filter switch assembly in a chamber of the housing. The ports may be accessible through a wall of the housing. A method for filtering a signal include switching, in response to a first signal, a receiver or a transceiver of a transceiver system from an unfiltered path connected to the antenna port to a filtered path connected to the antenna port. The method may further include switching, in response to a second signal, the receiver to the unfiltered path.