Modal Antenna Mode Switching for Signal Quality
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Solution Overview
Problem
Modal antennas in mobile computing devices face challenges in efficiently controlling their modes to adapt to varying radiation patterns and interference, limiting signal quality and compactness.
Innovation Solution
A mobile computing device with a modal antenna system that includes a driven element and a parasitic element, mechanically coupled to a remote location, and a radio frequency circuit that transmits RF signals and control signals over transmission lines to adjust the modal antenna's mode, allowing operation in multiple modes with distinct radiation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If modal antennas are used to provide improved signal quality and compact form factor, then signal quality and compactness are improved, but the ability to adapt to varying radiation patterns and interference is limited
Solution Approach 1:
The patent implements dynamic mode switching capability in the modal antenna system, allowing real-time adjustment between different operating modes (TM110, TM120, TM210) based on environmental conditions and interference patterns. This enables the antenna to adapt its radiation characteristics dynamically rather than being fixed in a single mode
Solution Approach 2:
The system changes operational parameters by switching between different resonant modes of the modal antenna, each mode providing different radiation patterns and frequency characteristics. This allows the antenna to optimize performance for different communication scenarios and interference conditions
2Volume of moving object
If modal antennas are used to provide improved signal quality and compact form factor, then compactness is improved, but the ability to adapt to varying radiation patterns and interference is limited
Solution Approach 1:
The modal antenna is designed to perform multiple functions by supporting several resonant modes within a single compact structure. Each mode provides different radiation characteristics, making the single antenna element universally applicable for various communication requirements without needing multiple separate antennas
3Adaptability or versatility
If control signals are transmitted over the transmission line to adjust modal antenna mode, then adaptability is improved, but transmission line complexity increases
Solution Approach 1:
The patent combines the RF signal transmission and control signal transmission into a single transmission line interface. The radio frequency circuit communicates both the RF signals for antenna operation and the control signals for mode adjustment over the same transmission line, reducing the number of separate connections required
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 improved signal quality and a more compact form factor by dynamically adjusting the radiation pattern and frequency of the modal antenna, enhancing beam steering and reducing interference.
Implementation Method 1
The radio frequency circuit may be configured to transmit an RF signal over the transmission line to the modal antenna
Implementation Method 2
a parasitic element configured to alter a radiation pattern associated with a driven element
Data Source
AI summary
A mobile computing device including a modal antenna is disclosed. The mobile computing device may include a radio frequency circuit and a modal antenna mechanically coupled to a portion of the mobile computing at a location that is remote from the radio frequency circuit. The modal antenna may include a driven element and a parasitic element positioned proximate to the driven element. The modal antenna may be operable in a plurality of different modes. Each mode may be associated with a different radiation pattern. The mobile computing device may include a transmission line coupling the radio frequency circuit to the modal antenna. The radio frequency circuit may be configured to transmit an RF signal over the transmission line to the modal antenna and configured to communicate a control signal to adjust the mode of the modal antenna over the transmission line.