Wireless Transmitter Cable Antenna FM Signal Transmission

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Solution Overview

Problem

Conventional vehicle multimedia systems are limited in receiving satellite radio and have suboptimal FM signal transmission due to the need for dedicated FM transmitting antennas, which restricts installation flexibility and audio quality.

Innovation Solution

A wireless transmitter that utilizes a cable as a transmitting antenna to separate and amplify FM signals, eliminating the need for dedicated FM antennas by converting and filtering DC sources to improve signal quality and flexibility in satellite radio receiver placement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a dedicated FM transmitting antenna is installed on vehicle housing or internal PCB, then FM signal transmission function is provided, but installation flexibility is reduced and signal transmission quality deteriorates

Engineering Contradiction:

ImproveFM signal transmission qualityVSAvoidInstallation flexibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The power supply cable is designed to serve dual functions: transmitting DC power from the power supply to the wireless transmitter, and simultaneously serving as the FM transmitting antenna. This eliminates the need for a separate dedicated antenna, thereby improving installation flexibility while maintaining FM signal transmission capability through the cable's conductive structure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If FM signal is transmitted through dedicated antenna, then transmission function is achieved, but system complexity increases due to multiple components

Engineering Contradiction:

ImproveFM signal transmissionVSAvoidSystem structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the power transmission function and FM signal transmission function into a single cable system. The power supply cable that delivers DC power is also used to transmit the FM signal from the wireless transmitter to the FM receiving antenna, thereby reducing the number of components and simplifying the overall system structure.

Inventive Principle:

Principle #5Merging (Combining)

3Power

If conventional CLA with internal PCB antenna is used, then power conversion function is provided, but FM signal transmission quality deteriorates due to restricted antenna shape

Engineering Contradiction:

ImprovePower conversionVSAvoidFM signal transmission quality

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The wireless transmitter receives DC power from the power supply through the power supply cable, converts it to RF signal, and transmits through the same cable to the FM receiving antenna. This multi-functional cable system eliminates the limitation of internal PCB antennas while maintaining power conversion capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enhances FM signal transmission quality and flexibility in installing satellite radio receivers by using the vehicle's power line as a transmission antenna, improving audio quality and simplifying installation processes.

Implementation Method 1

a first filtering unit coupled to a first cable, for filtering out an first FM signal transmitted on the first cable, and outputting a first DC source transmitted on the first cable

Methodology Applied

Scientific EffectFiltering: Filter (electronic)

Implementation Method 2

a first power converting unit coupled to the first filtering unit, for converting the first DC source into a second DC source

Methodology Applied

Scientific EffectPower conversion:

Implementation Method 3

a second filtering unit coupled to the first power converting unit, for eliminating noise in the second DC source

Methodology Applied

Scientific EffectNoise filtering: Filter (electronic)

Implementation Method 4

a first DC blocking unit for blocking the second DC source and outputting a second FM signal

Methodology Applied

Scientific EffectDC blocking:

Implementation Method 5

an amplifier coupled to the first DC blocking unit, for amplifying the second FM signal to generate the first FM signal

Methodology Applied

Scientific EffectSignal amplification:

Implementation Method 6

a second DC blocking unit coupled to the amplifier and the first cable, for blocking the first DC source transmitted on the first cable from the amplifier, and outputting the first FM signal to the first cable

Methodology Applied

Scientific EffectDC blocking:

Data Source

PatentUS8442438B2Wireless transmitter and related multimedia system

Publication Date: 2013.05.14 WISTRON NEWEB CORP

AI summary

A wireless transmitter includes a first filtering unit coupled to a first cable for outputting a first DC source transmitted on the first cable, a first power converting unit for converting the first DC source into a second DC source, a second filtering unit for eliminating noise in the second DC source, a first DC blocking unit for blocking the second DC source and outputting a second frequency modulation (FM) signal, an amplifier for amplifying the second FM signal to generate a first FM signal, and a second DC blocking unit coupled to the amplifier and the first cable, for outputting the first FM signal to the first cable, such that the first FM signal is transmitted to the air through the first cable as a transmitting antenna.