Switchable Broadband Antenna Using Reflection-Factor Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current broadband antennas have fixed directional characteristics and are not easily switchable or integrable, failing to meet the requirements of modern communication systems that need adaptable and compact designs.
Innovation Solution
A switchable broadband antenna with four parallel antenna paths, each equipped with a matching circuit, divider circuit, control circuit, and dipole antenna elements, allowing for adjustable polarization and directional characteristics through electronically controllable impedances like PIN diodes, enabling adaptive switching and integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate antennas are used to achieve switchable directional characteristics, then the antenna can be adapted to different applications and environments, but the device complexity increases and integration becomes difficult
Solution Approach 1:
The patent combines multiple dipole antenna elements (at least two) into a single integrated antenna structure that shares common components including the feed point, matching circuit, divider circuit, and control circuit. This merging approach enables switchable directional characteristics between broadside and end-fire modes without requiring multiple separate antennas, thereby reducing device complexity while maintaining adaptability.
Solution Approach 2:
The integrated antenna structure is designed to perform multiple functions: it can operate in different directional modes (broadside and end-fire), support impedance matching across different configurations, and provide signal division to multiple antenna elements. This multi-functionality is achieved through a single unified structure that replaces what would traditionally require multiple separate antenna systems.
2Ease of manufacture
If traditional broadband antennas with fixed directional characteristics are used, then the manufacturing is simple, but the antenna cannot be adapted to different applications and environments
Solution Approach 1:
The patent introduces dynamic switching capability into the antenna structure through electronically controllable impedances that can change the antenna's operational mode. The control circuit can switch between different directional characteristics (broadside and end-fire modes) by adjusting the impedance states, allowing the antenna to adapt to different applications while maintaining a relatively simple integrated structure that is easier to manufacture than multiple separate antennas.
3Adaptability or versatility
If externally mounted antennas are used to achieve directional switching, then the directional characteristic can be switched between different antennas, but the integration becomes difficult and the device size increases
Solution Approach 1:
The patent integrates multiple antenna elements and their control mechanisms into a single unified antenna structure. The dipole antenna elements, matching circuit, divider circuit, and control circuit are combined into one integrated unit that can be easily mounted and operated, eliminating the need for multiple externally mounted antennas while maintaining directional switching capability.
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 a broadband frequency response of 4-7 GHz with adjustable characteristics, facilitating easy integration and enhancing operational flexibility and diversity, particularly beneficial for fifth and sixth generation mobile communications and Wi-Fi applications.
Implementation Method 1
the respective matching circuit is configured to establish an impedance match for the input signal between the antenna feed point and the divider circuit
Implementation Method 2
the divider circuit is further configured to symmetrically divide a signal provided to the input point via the matching circuit and supply it to the respective output point of the divider circuit
Implementation Method 3
the control circuit has two electronically controllable impedances, for each of which at least two predetermined reflection factors can be set... different reflection factors are set between the two electronically controllable impedances
Data Source
Figure 1
Figure 2
Figure 3A~3D
AI summary
A switchable broadband antenna (ANT) with an antenna feed point (SP) for feeding in an input signal, further comprising four antenna paths (AE) connected in parallel with respect to the antenna feed point, each having a matching circuit (AS), a divider circuit (TS), a control circuit (SS), and a dipole antenna element (DP), wherein two dipole antenna elements are arranged in a first polarization direction, and - the respective matching circuit (AS) is configured to establish an impedance match for the input signal between the antenna feed point (SP) and the divider circuit (TS), and - the respective divider circuit (TS) has two divider lines (TL1, TL2) between an input point (EP) and two output points (AP1, AP2), and the divider circuit (TS) is further configuredto symmetrically divide a signal provided to the input point (EP) via the matching circuit (AS) and feed it to the respective output point (AP1, AP2) of the divider circuit (TS), which is connected to the respective dipole antenna element (DP), and - the control circuit (SS) has two electronically controllable impedances (D1, D2), wherein the two electronically controllable impedances (D1, D2) are each arranged in opposite directions, and the control circuit (SS) is configured to provide respective control voltages to the respective electronically controllable impedances (D1, D2) so that different reflection factors are set between the two electronically controllable impedances (D1, D2) in order to switch the signal provided by the matching circuit (AS) and thus control the antenna characteristic of the switchable broadband antenna (ANT).