Reconfigurable Antenna Device for Carrier Aggregation

The patent makes a single antenna structure capable of operating in multiple frequency bands by using switching circuits that can reconfigure the antenna's electrical length and resonance characteristics. The same physical antenna structure serves multiple functions across different frequency bands (e.g., 700MHz, 850MHz, 900MHz, 1800MHz, 2100MHz, 2600MHz) without requiring separate dedicated antennas for each band, thereby achieving multi-functionality and reducing overall device volume.

The patent employs switching circuits (such as SPDT switches) that can dynamically reconfigure the antenna structure during operation. By controlling the switching states, the antenna's effective electrical length and resonance frequency can be adjusted in real-time to match different frequency bands. This dynamic reconfiguration capability allows a single antenna to adapt to multiple frequency requirements without physical size increase.

Instead of designing separate antenna structures for each frequency band, the patent uses a universal antenna template with switching circuitry that can be configured for different bands. This approach simplifies manufacturing because the same basic antenna structure and PCB layout can be used across different device models and frequency requirements, reducing design iterations and manufacturing complexity.

The patent achieves frequency band adaptation by changing electrical parameters (switching states, connection configurations) rather than changing the physical antenna structure. This parameter-based adjustment approach maintains manufacturing simplicity because it involves software/control logic changes rather than hardware redesign, making production more straightforward and cost-effective.

The patent uses dynamically reconfigurable switching circuits to change the antenna's effective electrical length and resonance characteristics. By switching between different connection configurations, the same compact physical structure can resonate at multiple frequency bands. This dynamic approach allows compact size while maintaining multi-frequency capability through control logic rather than physical expansion.

The patent effectively nests multiple antenna functions within a single physical structure. The switching circuits allow the same radiating element to be electrically configured for different frequency bands, creating a nested functional relationship where one physical antenna contains multiple operational modes. This nesting approach achieves multi-frequency coverage without increasing physical volume.