Switchable Feed Terminals for Multi-Band Antenna Interference
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Solution Overview
Problem
There is a challenge in designing compact wireless devices that can efficiently support multiple communications bands while minimizing interference between antennas and other components, and ensuring satisfactory performance across a range of frequencies and data rates, especially as software applications become more data-intensive.
Innovation Solution
The solution involves a wireless electronic device with a housing that incorporates peripheral conductive structures forming antennas, including a resonating element arm separated by a slot, with adjustable components to tune frequency responses and optimize antenna efficiency across different bands, using a conductive path and switchable signal feed terminals to manage radio-frequency signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If antennas are incorporated into compact wireless devices to cover multiple communications bands, then the device can support more frequency ranges, but antenna interference with each other and with components increases
Solution Approach 1:
The antenna structure is divided into multiple segments separated by slots, with each segment capable of being independently fed and tuned. This segmentation allows different segments to operate at different frequencies with optimized impedance matching, reducing mutual interference while maintaining multi-band coverage capability.
Solution Approach 2:
The antenna incorporates switchable feed terminals and adjustable components that allow dynamic reconfiguration of the antenna structure. By selectively activating different feed terminals and adjusting components based on the desired communication band, the antenna can optimize its performance for each frequency range while minimizing interference with other antennas and components.
2Volume of moving object
If antenna structures are made compact to satisfy small form factor requirements, then device size is reduced, but antenna performance and data throughput deteriorate
Solution Approach 1:
The antenna utilizes three-dimensional housing structures to create resonating elements that achieve full-wavelength dimensions in vertical and depth directions while maintaining a compact planar footprint. This dimensional approach allows the antenna to achieve resonant frequencies necessary for high data throughput while fitting within small device form factors.
Solution Approach 2:
The antenna structure serves multiple functions simultaneously: it provides multi-band frequency coverage, maintains compact dimensions, achieves satisfactory impedance matching across bands, and supports high data throughput. The switchable feed terminals and adjustable components enable a single antenna structure to perform what would traditionally require multiple separate antennas.
3Adaptability or versatility
If switchable feed terminals and adjustable components are added to optimize multi-band performance, then frequency coverage is improved, but device complexity increases
Solution Approach 1:
Multiple feed terminals and control functions are merged into a single integrated antenna structure. The switchable feed terminals are incorporated directly into the antenna housing segments, and adjustable components are integrated along the transmission path. This consolidation achieves multi-band optimization without requiring separate antenna assemblies for each frequency range.
Solution Approach 2:
The antenna structure is designed to be self-configuring through its switchable feed terminals and adjustable components that can be selectively activated based on the desired operating band. The system automatically adapts its configuration to optimize performance for the selected frequency range, reducing the need for complex external control mechanisms.
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
This configuration enables improved antenna efficiency and data throughput by allowing the device to effectively cover multiple frequency bands with reduced interference, enhancing wireless communications performance in compact form factors.
Implementation Method 1
the resonating element arm may convey radio-frequency signals in the cellular high band
Implementation Method 2
A dielectric-filled gap in the peripheral conductive housing structures may separate the first segment from a second segment
Implementation Method 3
the vertical portion of the slot may radiate in the cellular high band
Data Source
AI summary
An electronic device may include a conductive housing and an antenna. The antenna may include an arm formed from a first segment of the housing. A gap may separate the first segment from a second segment. The antenna may include a feed coupled to a transmission line having a signal conductor. The feed may include first and second positive terminals on the first segment and a third positive terminal on the second segment. An adjustable component may be coupled between the first and third terminals. The signal conductor may be coupled to the first terminal. A wide conductive trace may be coupled between the signal conductor and the second terminal. A switch may be interposed on the signal conductor. The second terminal may cover a cellular low band when the switch is open. The first terminal may cover the cellular low band and higher bands when the switch is closed.