Passive Planar Aperture Antenna for Signal Penetration
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Solution Overview
Problem
Energy-efficient building materials, such as conductive-coated windows and aluminum foil thermal insulation, significantly attenuate radio signals, leading to mobile phone coverage issues in new buildings, and existing repeater solutions are costly and not compatible with network control frequencies.
Innovation Solution
A passive wideband repeater antenna structure integrated into window frames or structures, utilizing a planar aperture antenna design with a transmission section of parallel conductor lines and a gap, capable of improving radio wave penetration across a wide frequency range, including future frequency bands, and directing signals to shadow areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If energy-efficient building materials (conductive-coated windows, aluminum foil thermal insulation) are used, then thermal insulation performance is improved, but radio signal transmission is significantly attenuated
Solution Approach 1:
A passive repeater antenna system is introduced as an intermediary device between the base station and the mobile device. The system includes a first antenna for receiving signals, a transmission section with parallel conductor lines for transmitting signals through the window, and a second antenna for re-radiating signals into the building. This intermediary structure enables signal penetration through energy-efficient windows without compromising their thermal insulation properties.
2Reliability
If base stations are built more densely or within large buildings, then mobile phone coverage is improved, but costs are very high
Solution Approach 1:
The invention extracts the signal repetition function from expensive base station infrastructure and implements it through a passive, low-cost antenna system integrated into the building's window structure. By using passive components (antennas, transmission lines, and matching networks) rather than active base station equipment, the solution achieves coverage improvement without the high costs associated with building dense base station networks.
3Reliability
If active amplifier-equipped repeater devices are used, then signal reception is improved, but they interfere with network control and are not accepted by operators
Solution Approach 1:
The invention converts the potential harm of signal interference into a benefit by using a passive repeater system that operates without active amplification. The passive antenna structure receives signals, transmits them through the window, and re-radiates them without adding noise or interfering with network control channels, thus eliminating the harmful effects of active repeaters while maintaining signal reception improvement.
4Reliability
If resonance-type repeater antenna structures are used, then signal repetition is achieved, but future frequency bands cannot be accommodated
Solution Approach 1:
The invention designs a universal repeater antenna system that can operate across multiple frequency bands. The parallel conductor line transmission section and matching network are configured to provide broadband operation, enabling the same antenna structure to serve current frequency bands and future frequency bands without requiring redesign, thus achieving multi-functionality and adaptability.
5Reliability
If coaxial cable connections are used between antennas, then signal transmission is achieved, but broadband matching is difficult and cost increases
Solution Approach 1:
The invention merges the transmission line and antenna structures into an integrated planar design. The parallel conductor lines are directly connected to the antennas without requiring separate coaxial cables, connectors, or matching components. This integration simplifies the overall structure, reduces complexity, and enables broadband operation while maintaining efficient signal transmission.
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
Enhances indoor mobile communication coverage in energy-efficient buildings by improving radio wave penetration and adaptability to future frequency bands, reducing costs and network interference.
Implementation Method 1
A signal receiving section (1) is provided to receive an incoming signal (4). A signal transmission section (3) is provided to transmit the signal received by the signal receiving section (1) through the window structure (11).
Implementation Method 2
The signal transmission section (3) is realized as two parallel conductor lines (8) between which there is a gap (9).
Implementation Method 3
A re-radiating section (2) is provided to repeat the signal transmitted through the barrier by the signal transmission section (3).
Data Source
AI summary
The invention comprises a device for receiving electromagnetic signal and radiating the signal further. With that device the signal can be repeated on the other side of a barrier, for example a wall, which prevents the signal to propagate.The receiving section (1) of the device has been made as a planar aperture antenna, as well as the re-radiating section (2). The above-mentioned planar aperture antenna has been made so that between the antenna parts of conductive material (6) there is an opening (7) which opens in the propagation direction of the signal (4 and 5).Between the above-mentioned receiving section (1) and the re-radiating section (2) there is a signal transmission section (3) which has been implemented as two parallel conductors (8) with a gap (9). The transitions between the receiving section (1), the signal transmission section (3) and the re-radiating section (2) have been realized in stepless manner without separate connectors.