Distributed Monopole Transmitter Antenna Segmentation
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Solution Overview
Problem
Electrically small antennas are limited in power handling and bandwidth, particularly for low-frequency applications, due to voltage constraints and poor radiation efficiency, making them inadequate for high-power and mobile uses.
Innovation Solution
A distributed transmitter antenna system with multiple electrically-floating transmitters along the length of a monopole or dipole antenna, where each transmitter is coupled to multiple segments, allowing increased voltage and radiated power without relying on narrowband resonance, and power can be delivered through conductors, mechanical means, or energy harvesting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single transmitter is used at the base of a monopole antenna, then the antenna structure is simple, but the radiated power is insufficient for high-power applications
Solution Approach 1:
The monopole antenna is divided into multiple segments along its length, with each segment connected to a separate transmitter. This segmentation allows the total radiated power to be distributed across multiple transmitters, enabling high power output while keeping individual transmitter complexity manageable. The segments work together coherently to produce the desired radiation pattern.
Solution Approach 2:
Multiple transmitters are combined to feed multiple antenna segments, merging their individual power contributions to achieve high total radiated power. The transmitters are coordinated to operate in phase, combining their effects constructively at the radiation level while maintaining system manageability through modular architecture.
2Power
If the antenna is resonated with inductance to achieve sufficient radiated power, then the radiated power increases, but the bandwidth becomes narrow
Solution Approach 1:
The antenna is segmented and fed by multiple transmitters at different positions along the monopole. This distributed feeding structure allows each segment to contribute to the radiation without requiring strong inductive resonance, thereby achieving high power output with broader bandwidth compared to traditional resonated antennas.
Solution Approach 2:
The feeding points and impedance characteristics are optimized across multiple segments to achieve a bandwidth of at least 5% while maintaining high radiated power. The segmented structure allows for better impedance matching and reduced Q-factor, expanding the operational bandwidth without sacrificing power capability.
3Adaptability or versatility
If the height or size of the top-load is increased to increase antenna bandwidth and power handling, then the bandwidth and power handling improve, but the antenna becomes incompatible with mobile applications
Solution Approach 1:
The monopole antenna is divided into multiple segments along its length, with each segment fed by a separate transmitter. This segmentation allows the antenna to achieve enhanced bandwidth and power handling capabilities through distributed feeding, while maintaining a compact overall height suitable for mobile applications. The multiple feeding points create effective electrical length without increasing physical height.
Solution Approach 2:
Instead of increasing antenna height in one dimension to improve bandwidth, the patent uses multiple feeding points distributed along the antenna length, utilizing the spatial distribution dimension to achieve bandwidth enhancement while keeping the antenna compact.
4Power
If multiple distributed transmitters are used along the antenna, then the radiated power and bandwidth increase, but the device complexity increases
Solution Approach 1:
The antenna system is segmented into multiple sections, each with its own transmitter. This modular segmentation allows the high power and bandwidth capabilities to be achieved through parallel operation of simpler transmitter units, making the overall system more manageable than a single complex high-power transmitter.
Data Source
AI summary
A distributed transmitter antenna includes a plurality of antenna segments and a plurality of transmitters. A first transmitter of the plurality of transmitters is coupled to a first antenna segment of the plurality of antenna segments, and a second transmitter of the plurality of transmitters is coupled to the first antenna segment and a second antenna segment of the plurality of antenna segments.