Stacked Dual-Band Patch Antenna With Independent Wideband Excitation
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Solution Overview
Problem
Existing dual band antennas face challenges in achieving wide bandwidths for both frequency bands, particularly at frequencies like 28 GHz and 39 GHz, and complex designs often increase size and cost, while stacked patch antennas are tightly coupled and difficult to scale.
Innovation Solution
A dual wideband antenna structure with independent stacked patch antennas, using a dielectric substrate and frequency selective coupling, allows for orthogonal polarization and separate excitation vias to operate at arbitrary frequency bands with wide bandwidths, utilizing a single excitation or dual stripline configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If stacked patch antennas are used for dual band operation, then both frequency bands can be operated simultaneously, but the bandwidth for each band is limited and the design becomes tightly coupled
Solution Approach 1:
The antenna is divided into two independent patch elements operating at different frequency bands. Each patch is independently designed and excited, allowing separate optimization of bandwidth for each band without the tight coupling that limits conventional stacked patch designs.
Solution Approach 2:
The patches are positioned at different vertical heights above the ground plane, creating a three-dimensional configuration. This spatial separation in the vertical dimension enables independent resonance characteristics for each patch while maintaining compact overall size.
2Quantity of substance
If complex antenna designs are used to achieve wide bandwidths, then dual band performance can be improved, but the size and cost increase
Solution Approach 1:
The bandwidth of each patch is controlled by adjusting geometric parameters such as patch dimensions, spacing from ground plane, and position relative to each other. This allows wide bandwidth achievement through simple parameter optimization rather than complex structural modifications.
3Adaptability or versatility
If separate excitation conductors are used for each patch, then independent operation at different frequencies is achieved, but the device complexity increases
Solution Approach 1:
A single stripline excitation conductor serves as an intermediary that couples to both patches through their respective gaps. This intermediate coupling mechanism enables independent excitation of each patch at different frequencies while using a unified excitation structure, reducing overall system complexity.
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 antenna structure achieves simultaneous operation in both 28 GHz and 39 GHz bands with wide bandwidths, reducing system cost and complexity by using a single antenna array, and enabling beam steering capabilities.
Implementation Method 1
spaced apart by a dielectric substrate
Implementation Method 2
a first patch antenna disposed on a first layer of the structure... a second patch antenna disposed on a second layer of the structure
Data Source
AI summary
Systems, devices, and methods related to dual wideband antennas with arbitrary frequency ranges are provided. An example antenna structure includes a high-band patch antenna to wirelessly communicate a first signal in a first frequency band; a low-band patch antenna to wirelessly communicate a second signal in a second frequency band lower than the first frequency band, wherein the low-band patch antenna is stacked vertically below the high-band patch antenna and spaced apart from the high-band patch antenna by a dielectric substrate; a high-band excitation via electrically coupled to the high-band patch antenna; and a low-band excitation via electrically coupled to the low-band patch antenna, wherein the high-band excitation via is separate from the low-band excitation via.