Monoconical Antenna for Wideband Sensor Gain Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices for measuring the gain of electromagnetic field sensors are limited by their ability to cover only narrow frequency bands and require multiple transmit antennas, making them complex and costly for wide frequency band measurements.
Innovation Solution
A device comprising a monoconical antenna with a cone-shaped conductive part and a planar conductive element, connected via a coaxial cable, which allows for the measurement of gain across a wide frequency band (100 MHz-40 GHz) using a single antenna configuration, with a turntable for varying wave incidence, and an anechoic chamber for accurate voltage measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transmit antennas are used to cover wide frequency bands, then the frequency band coverage is improved, but the device complexity and cost increase
Solution Approach 1:
The patent employs a single transmit antenna that operates across the entire frequency band from 100 MHz to 40 GHz, making it a universal antenna capable of performing multiple frequency measurements. This eliminates the need for multiple specialized antennas, thereby reducing device complexity while maintaining wide frequency band coverage.
Solution Approach 2:
The patent changes the operating parameters (frequency) of a single antenna rather than using multiple antennas at fixed frequencies. By sweeping through a wide frequency range with one antenna, the system achieves multi-functionality without the complexity of multiple antenna elements.
2Adaptability or versatility
If multiple transmit antennas are used to cover wide frequency bands, then the frequency band coverage is improved, but the cost increases
Solution Approach 1:
A single universal transmit antenna replaces multiple frequency-specific antennas, reducing the quantity of expensive antenna components required. This universal antenna design lowers material costs, manufacturing expenses, and system integration costs while maintaining the capability to measure across wide frequency bands.
3Device complexity
If narrow frequency band measurement devices are used, then the device complexity is reduced, but the frequency band coverage is limited
Solution Approach 1:
The system maintains simple device architecture while achieving wide frequency coverage by dynamically changing the operating frequency parameter of the single transmit antenna. The measurement system sweeps through frequencies from 100 MHz to 40 GHz, providing broad adaptability without increasing structural 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
Enables precise gain measurements across a very wide frequency band (100 MHz-40 GHz) with reduced complexity and cost, while allowing for the measurement of gain as a function of wave incidence, demonstrating excellent performance compared to prior art.
Implementation Method 1
a monoconical antenna consisting of a conductive part in the shape of a cone C and an electrically conductive planar element P, a source of electromagnetic waves S
Data Source
Figure 1
Figure 2
Figure 3~4A
AI summary
The invention relates to a device for measuring the gain of an electromagnetic field sensor (CP), comprising an electromagnetic wave source and an antenna that is connected to the electromagnetic wave source and radiates an electromagnetic field towards the sensor. The invention is characterised in that the antenna is a monoconical antenna comprising a planar conductive element (P) having a first surface and a second surface opposite the first surface and a conductive part in the form of a cone (C) arranged on the side of the first surface. The invention is applicable to gain measurements on very wide frequency bands.