Antenna Resonant Control Circuit for Multi-Band Signal Reception
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Solution Overview
Problem
Existing antennas cannot efficiently support a broad receiving bandwidth for multiple broadcasting signals simultaneously, leading to increased hardware costs and complexity, as well as difficulties in receiving desired signals and maintaining reception quality.
Innovation Solution
A control circuit and method that adjusts the frequency resonance point of an antenna using a voltage-controlled capacitor, allowing the antenna to selectively receive and process multiple broadcasting signals by generating a voltage control signal based on a frequency-voltage look-up table, thereby optimizing the receiving bandwidth and rejecting unnecessary signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a plurality of antennas and tuning units are used to receive different broadcasting signals separately, then the receiving bandwidth is expanded, but the total volume and hardware cost are increased
Solution Approach 1:
The patent applies multi-functionality by enabling a single antenna to receive multiple types of broadcasting signals (FM, DAB, DVB-T, WiMAX, WLAN) across different frequency bands. The antenna structure is designed with broad bandwidth coverage, and the control circuit dynamically adjusts the resonant frequency to match different signal types, allowing one antenna to perform the function of multiple dedicated antennas.
Solution Approach 2:
The patent employs dynamics by using a voltage-controlled capacitor in the resonant circuit that can dynamically adjust the resonant frequency of the antenna. The control circuit receives signals from the demodulator and modifies the capacitor's voltage to shift the resonant frequency, enabling the antenna to adapt to different broadcasting standards and frequency ranges in real-time.
2Ease of manufacture
If an integrated antenna is used to receive multiple broadcasting signals, then the production cost is reduced, but unnecessary signals are received causing difficulty in post-processing
Solution Approach 1:
The patent implements feedback by using the demodulator to detect the quality and type of received signals, then feeding this information back to the control circuit. The control circuit adjusts the resonant frequency based on this feedback to optimize signal reception and filter out unnecessary signals, ensuring that only relevant broadcasting signals are processed further.
Solution Approach 2:
The patent applies parameter changes by dynamically modifying the resonant frequency parameter of the antenna through voltage control of the capacitor. This allows the antenna to shift its operating characteristics to match the desired signal type, effectively selecting and optimizing reception for specific broadcasting standards while rejecting others.
3Adaptability or versatility
If the antenna bandwidth is broadened to cover multiple frequency bands, then multiple signals can be received, but the reception quality for desired signals deteriorates
Solution Approach 1:
The patent uses dynamics to adjust the antenna's resonant frequency in real-time based on the desired signal type. By dynamically tuning the resonant frequency to match the target broadcasting standard, the antenna concentrates its reception capability on the desired frequency band, thereby maintaining high reception quality while still being capable of receiving multiple different signals across various bands.
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
This solution simplifies circuitry, reduces costs, and improves signal reception quality by allowing a single antenna to effectively handle multiple broadcasting signals while minimizing unnecessary signal reception.
Implementation Method 1
The antenna resonant control circuit includes a voltage-controlled capacitor and adjusts the receiving bandwidth of the antenna according to the voltage control signal
Implementation Method 2
A control circuit and method for controlling frequency resonance point of an antenna
Data Source
AI summary
The present invention disclosed an apparatus and method for receiving a plurality of broadcasting signals. The apparatus comprises: a control circuit for generating an analog control voltage signal according to a frequency-voltage look-up table and a desired frequency; an antenna module comprising an antenna and an antenna resonant control circuit comprising a voltage-controlled capacitor being controlled by the analog control voltage signal, wherein the antenna resonant control circuit comprises a voltage-controlled capacitor to control the bandwidth received by the antenna according to the analog control voltage signal; a tuner for tuning a broadcasting signal received by the antenna to generate an output signal; and a demodulator for demodulating the output signal of the tuner.