LNB Feedhorn Single Local Oscillator Band Stacking

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Solution Overview

Problem

Modern satellite reception systems face challenges with high-frequency local oscillators in low noise block converter feedhorns, which are expensive and have shorter service lives, making them difficult to produce accurately and maintain effectively.

Innovation Solution

A low noise block converter feedhorn design that employs a single local oscillator for band translating multiple transmissions, including left-hand and right-hand polarized signals, using mixers and combiners to stack and translate signals efficiently, reducing the need for high-frequency components and improving signal processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If high-frequency local oscillators are used in low noise block converter feedhorns, then band stacking and translation can be achieved, but the cost increases and service life decreases

Engineering Contradiction:

Improveband stacking and translation capabilityVSAvoidservice life of local oscillator

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent changes the frequency parameter of the local oscillator from high-frequency to low-frequency range. This parameter change allows the system to achieve band stacking and translation capabilities while using more reliable and cost-effective low-frequency oscillators, thereby resolving the contradiction between adaptability and reliability

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If high-frequency local oscillators are used, then signal processing for multiple satellite transmissions is enabled, but manufacturing difficulty and cost increase

Engineering Contradiction:

Improvesignal processing capabilityVSAvoidease of producing accurate local oscillator

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The invention changes the operating frequency parameter from high to low, making the local oscillator easier and less costly to manufacture with high accuracy. Low-frequency oscillators are well-established technologies with simpler manufacturing requirements compared to high-frequency components

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

By using low-frequency local oscillators instead of expensive high-frequency ones, the system replaces costly components with more economical alternatives, reducing overall manufacturing cost while maintaining the required signal processing functionality

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Productivity

If high-frequency local oscillators are used, then band stacking performance is improved, but maintenance difficulty increases

Engineering Contradiction:

Improveband stacking efficiencyVSAvoidease of maintaining local oscillator

Core Design Contradiction:

ProductivityVSEase of repair

Solution Approach 1:

The patent changes the frequency parameter to low-frequency range, making the local oscillator more maintainable. Low-frequency components have longer wavelengths and are less susceptible to environmental interference, making them easier to diagnose, repair, and maintain in field conditions

Inventive Principle:

Principle #35Parameter changes

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 solution enables cost-effective and reliable signal processing for multiple satellite transmissions by using a single local oscillator, enhancing the stability and efficiency of band stacking and translation processes, thus overcoming the limitations of high-frequency oscillator challenges.

Implementation Method 1

a first mixer operative to receive the first input signal from the signal receiver, further operative to mix the first input signal with a first reference signal to create a first translated signal

Methodology Applied

Scientific EffectFrequency mixing: Heterodyne

Data Source

PatentUS9179170B2Low noise block converter feedhorn

Publication Date: 2015.11.03 DISH TECHNOLOGIES LLC

AI summary

A circuit, electrical device or other apparatus for band stacking and/or band translating multiple transmissions. Such transmissions may be satellite transmissions, terrestrial transmissions, signals carried across a wired network such as a cable network, and so forth. Two sets of left-hand polarized and right-hand polarized signals may be accepted by an embodiment. One left-hand polarized signal and one right-hand polarized signal may be band stacked such that the left-hand polarized signal occupies a first frequency and the right-hand polarized signal occupies a second frequency, thereby permitting the two signals to be transmitted simultaneously across a single transmission line as a first unique signal. The second left-hand polarized signal and second right-hand polarized signal may likewise be combined into a second unique signal for transmission. The first and second unique signals may be stacked as a first stacked output and a second stacked output by a band translating circuit.