Vehicle-Mounted Antenna Structure for Hidden Wide-Band Reception
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Solution Overview
Problem
There is a need for a vehicle-mounted antenna that can receive a wide band of frequencies without being visible to passengers, as existing solutions that attach multiple antennas to vehicle windows are aesthetically unappealing.
Innovation Solution
A vehicle-mounted antenna design featuring a power supply pin with a first and second radiation element extending in opposite horizontal directions, where the second radiation element is longer and adjusts input impedance for wide-band reception, and is fixed to the vehicle body via insulating members to achieve impedance matching and mutual coupling, allowing for compact installation out of sight from passengers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are attached to the vehicle window to receive wide-band frequencies, then the frequency reception capability is improved, but the aesthetic appearance deteriorates because the antennas are visible to passengers
Solution Approach 1:
The patent combines multiple radiation elements (first and second radiation elements of different lengths) into a single integrated antenna structure mounted on the vehicle body. This merging allows the antenna to receive multiple frequency bands simultaneously while maintaining a compact, aesthetically pleasing appearance that does not compromise vehicle aesthetics.
Solution Approach 2:
The patent transitions from mounting antennas on the two-dimensional surface of vehicle windows to mounting a three-dimensional integrated antenna structure on the vehicle body. This dimensional change allows the antenna to be positioned out of sight from passengers while maintaining frequency reception capabilities.
2Shape
If a compact antenna configuration is used to hide it from passengers, then the aesthetic appearance is improved, but the wide-band reception capability may deteriorate
Solution Approach 1:
The patent divides the antenna into segmented radiation elements (first radiation element and second radiation element of different lengths) that are fixed to the vehicle body at different positions. This segmentation allows each element to be optimized for specific frequency ranges while maintaining a compact overall structure that remains hidden from passengers.
Solution Approach 2:
The patent applies different local qualities to different parts of the antenna structure, with the first radiation element optimized for certain frequencies and the second radiation element optimized for other frequencies. This local optimization enables wide-band reception within a compact form factor that preserves aesthetic appearance.
3Adaptability or versatility
If the second radiation element is made longer to adjust input impedance for wide-band reception, then the frequency reception capability is improved, but the antenna size increases making it more visible
Solution Approach 1:
The patent arranges the first and second radiation elements in a nested or overlapping configuration where they share common mounting points and space. This nesting allows the longer second radiation element to provide impedance matching for wide-band reception while the overall antenna structure remains compact and can be positioned within the vehicle body where it is not visible.
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 achieves high gain in a wide band with a compact configuration, ensuring it is not visible to passengers while effectively receiving wide-band radio waves, improving aesthetics and impedance matching across various frequencies.
Implementation Method 1
mutual coupling is generated between the body and the first radiation element and between the body and the second radiation element, and a wide-band radio wave can be received
Implementation Method 2
The first tip portion of the first radiation element is fixed to the body via a first insulating member. The second radiation element is longer than the first radiation element and comprises a second tip portion and an intermediate portion
Implementation Method 3
The first tip portion of the first radiation element is fixed to the body via a first insulating member. The intermediate portion located between the power supply pin and the second tip portion, and being fixed to the body via a second insulating member
Data Source
AI summary
The vehicle-mounted antenna includes a power supply pin disposed upright on the body, a first radiation element extending from the power supply pin in a horizontal plane rearward of the vehicle, and a second radiation element extending from the power supply pin in a horizontal plane forward of the vehicle. The first tip portion of the first radiation element is fixed to the body via a first insulating member. The second radiation element is longer than the first radiation element and comprises a second tip portion and an intermediate portion. The second tip portion is connected to the body. The intermediate portion is located between the power supply pin and the second tip portion and is fixed to the body via the second insulating member.