Home   /   Portfolio   /  Dual Polar LNB

Dual Polar LNB

Competitiveness & Growth
STATUS | Ongoing
STATUS DATE | 13/07/2009
ACTIVITY CODE |

PAGE CONTENTS

Objectives

A DBS service provider has approached us to design, develop, and manufacture their own variant of the Dual Linear and Circular Polarised LNB, which is completing its development under ESTEC Contract 18289/04/NL/AD.

This new variant will be used to double the bandwidth currently available for transmitting domestic television signals.

Currently, this can only be done by using the linearly polarised 11.7 GHz to 12.2 GHz FSS band in conjunction with the existing circularly polarised 12.2 GHz to 12.7 GHz DBS band.

The unit will be designed to receive circularly polarised signals of either polarity in the frequency band 12.2-12.7 GHz Ku band from current orbital locations and also receive linear polarised signals of either polarity in the frequency band 11.7-12.2GHz in the Ku band from the collocated satellites.

Challenges


  1. Feed Horn:  The current install base of antennas is very elliptic, and therefore an elliptic radiation pattern is required from the feed horn with equivalent performance in both CP and LP modes.

  2. Customer Approvals:  A rigorous approvals process with a high degree of extended life testing over a wide temperature range is operated by the customer.

  3. Designing a Frequency Diplexing and switching system that can meet the high performance demands of the customer.

  4. High cross polar performance over a wide RF bandwidth.

  5. Complex power supply design is required to meet a low current budget from the STB.

Plan

The project is divided into 8 Work Packages. These are:


  • Electrical Design (WP1)

  • Mechanical Design (WP2)

  • PVT Build (WP3)

  • Design Jigs and Manufacture (WP4)

  • FCC Aprovals (WP5)

  • Feed Horn and Cap Design (WP6)

  • Project Admin (WP7)

  • Customer System Tests (WP8)

Current Status


  • Electrical Design (WP1): Design activities completed.

  • Mechanical Design (WP2): Design activities completed.

  • PVT Build (WP3): Completed.

  • Design Jigs and Manufacture (WP4): Completed.

  • FCC Aprovals (WP5): Completed.

  • Feed Horn and Cap Design (WP6): Completed

  • Project Admin (WP7): Completed

  • Customer System Tests (WP8): Completed