RF Cable Control Signal Transmission via Choke Inductors
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Solution Overview
Problem
Current electronic devices with active antennas require additional wires and connectors for control signal transmission, occupying space on the printed circuit board and increasing costs.
Innovation Solution
A signal transmission device using a radio frequency (RF) processing circuit and cable connecting circuit with choke inductors, bypass capacitors, and coupling capacitors to transmit control signals through an RF cable without altering its structure, utilizing the RF cable's conductors to create virtual short and open circuits for high and low frequency signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional wires and connectors are installed to transmit control signals to the active antenna, then control signal transmission is achieved, but the cost increases and space on the printed circuit board is occupied
Solution Approach 1:
The RF cable is designed to perform multiple functions: transmitting both RF signals and control signals through the same physical medium. The inner conductor and outer mesh conductor of the RF cable are utilized to carry control signals in addition to their primary RF signal transmission function, eliminating the need for separate control wires and connectors
Solution Approach 2:
The control signal transmission function is merged with the existing RF cable structure. By using the conductors already present in the RF cable (inner conductor and outer mesh conductor) to carry control signals, the patent combines multiple signal transmission functions into a single cable assembly, reducing overall system complexity
2Reliability
If additional wires and connectors are installed to transmit control signals, then control signal transmission is achieved, but space on the printed circuit board is occupied
Solution Approach 1:
The RF cable serves multiple purposes by transmitting both RF signals and control signals through its existing conductors. This multi-functionality eliminates the need for additional dedicated control signal terminals on the printed circuit board, thereby preserving valuable board space
Solution Approach 2:
The patent merges control signal transmission with the existing RF cable connection, allowing control signals to be transmitted through the same physical pathway as RF signals. This consolidation removes the need for separate control signal connection points on the printed circuit board
3Reliability
If the structure of the RF cable is altered to transmit control signals, then control signal transmission is achieved, but the RF cable design becomes more complex
Solution Approach 1:
The patent achieves control signal transmission by utilizing the existing conductors in the standard RF cable structure without requiring any modifications to the cable itself. The inner conductor and outer mesh conductor are repurposed to carry control signals, maintaining cable design simplicity while adding functional capability
Solution Approach 2:
The existing RF cable structure serves its own additional function by using its inherent conductors to transmit control signals. No external modifications or additional components are required in the cable itself, as it leverages its existing structure to provide the new control signal transmission function
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
Enables control signal transmission through the RF cable without additional wires or connectors, saving space and costs on the printed circuit board while maintaining efficient high and low frequency signal exchange.
Implementation Method 1
One end of a first choke inductor is coupled to a transceiver end of the RF transceiver, the other end of the first choke inductor is coupled to a first control end of the RF antenna controller
Implementation Method 2
The first bypass capacitor is coupled between the other end of the first choke inductor and a digital ground terminal
Data Source
AI summary
A signal transmission device, including a RF processing circuit and a cable connecting circuit including a first choke inductor, a first and second bypass capacitors, and a first coupling capacitor, is provided. One end of the first choke inductor is coupled to a transceiver end of a RF transceiver and the other end is coupled to a first control end of a RF antenna controller. The transceiver end is coupled to a first conductor. The first bypass capacitor is coupled between the other end and a digital ground terminal. The first coupling capacitor is coupled between the digital ground terminal and a RF ground terminal. The second conductor is coupled to the RF ground terminal and a second control terminal of the RF antenna controller at a second connecting end of a RF cable. The second bypass capacitor is coupled between the second control terminal and the digital ground terminal.