RF Filter Coupling Control for Low-Loss Signal Routing
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Solution Overview
Problem
The insertion loss introduced by reconfigurable cross couplers in radio frequency channels affects system performance, as they are additional components that increase power consumption and reduce flexibility in signal output states.
Innovation Solution
A communication apparatus is designed with filters and coupling control units, allowing the system to switch between power division and pass-through states without introducing additional insertion loss, using PIN diodes, varactor diodes, and ground control assemblies to control coupling rods and resonant cavities for efficient radio frequency signal filtering and routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reconfigurable cross coupler is used in the radio frequency channel to switch between power division state and pass-through state, then the flexibility of signal output status is improved, but the insertion loss increases and system performance deteriorates
Solution Approach 1:
The patent merges the reconfigurable cross coupler functionality directly into the filter structure by adding coupling control units between resonant cavities of first and second filters. This integration eliminates the need for separate reconfigurable cross coupler components, thereby maintaining signal path integrity and reducing insertion loss while preserving the ability to switch between power division and pass-through states.
Solution Approach 2:
The filter structure is designed to perform multiple functions: it acts as both a frequency-selective filter and a reconfigurable cross coupler. By incorporating coupling control units that can dynamically connect or disconnect between resonant cavities of different filters, the system achieves multi-functionality without requiring separate dedicated components for each function, thus reducing overall insertion loss.
2Use of energy by stationary object
If a reconfigurable cross coupler is used to enable power division state, then the power consumption of radio frequency channel is reduced, but the insertion loss increases due to additional components
Solution Approach 1:
The patent combines the power division functionality with the filter structure by integrating coupling control units between resonant cavities. This merging eliminates the need for separate reconfigurable cross coupler components that would introduce additional insertion loss, while still enabling the radio frequency channel to switch to power division state for reduced power consumption during low-traffic conditions.
Solution Approach 2:
The patent extracts the essential reconfigurable cross coupler functionality from separate components and embeds it directly within the filter structure. By taking out the need for external reconfigurable cross couplers and integrating the coupling control capability into the filter's resonant cavities, the system reduces insertion loss while maintaining the ability to reduce power consumption through power division state.
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 solution enables the communication apparatus to operate efficiently in both power division and pass-through states, reducing system insertion loss and power consumption while maintaining base station performance, thereby improving flexibility and reducing power usage.
Implementation Method 1
The coupling control unit includes a positive-intrinsic-negative (PIN) diode 11, a PIN diode 12, a voltage control pin V1, a voltage control pin V2, a microstrip 1, and a microstrip 2. The voltage control pin V1 is connected to the PIN diode 11. A positive electrode of the PIN diode 11 is connected to the microstrip 1, and a negative electrode of the PIN diode 11 is connected to the microstrip 2. The voltage control pin V2 is connected to the PIN diode 12. A negative electrode of the PIN diode 12 is connected to the microstrip 1, and a positive electrode of the PIN diode 12 is connected to the microstrip 2.
Implementation Method 2
The first filter includes at least one resonant cavity, and there is a first coupling rod in a 1st resonant cavity of the first filter. The second filter includes at least one resonant cavity, and there is a second coupling rod in a 1st resonant cavity of the second filter. The first filter and the second filter are configured to filter a radio frequency signal.
Data Source
AI summary
Embodiments of this application disclose a communication apparatus. The communication apparatus includes a first filter, a second filter, and a coupling control unit. There is a first coupling rod in a 1st resonant cavity of the first filter, and there is a second coupling rod in a 1st resonant cavity of the second filter. The coupling control unit is located between the 1st resonant cavity of the first filter and the 1st resonant cavity of the second filter, and the coupling control unit is connected to the first coupling rod and the second coupling rod. The first filter and the second filter are configured to filter a radio frequency signal. The coupling control unit is configured to control connection or disconnection between the first coupling rod and the second coupling rod.