Information for ruling 600011706
This section is Advance Tariff Ruling
- Start date
- 04 Nov 2024
- Expiry date
- 03 Nov 2027
- Commodity code
- 8529109500 (opens in new tab)
- Description
- A Waveguide which is copper and is a hollow, metallic structure specifically designed to guide electromagnetic waves, particularly in the radio frequency ranges, at lower loss than coaxial cables. The products are manufactured in a wide array of lengths and are commonly found in rectangular or circular cross-sections. A Waveguide is a critical part of a satellite telecommunications “system” which is used for communications over commercial frequency satellites. The “system” provides voice and data connectivity to radio frequency (RF) networks. Copper, known for its high electrical conductivity, minimizes signal loss making it suitable for carrying the relatively weak signals encountered in satellite communications, where maintaining signal integrity is critical. It is used to connect antennas to transmitters and receivers, ensuring efficient signal transmission over long distances. Electromagnetic waves travel through the waveguide by reflecting off the internal walls with the product design ensuring that the waves remain within the guide, effectively preventing loss of signal strength. Each waveguide has a specific cut off frequency; below this frequency, signals cannot propagate. The design is tailored to ensure that only desired frequencies pass through efficiently. A waveguide run/structure typically comprises several key components, which work together to guide electromagnetic waves effectively. Flanges (made of brass) are used to connect sections of the waveguide securely. They often include gaskets to ensure an airtight seal. Connectors facilitate connections between waveguide segments and other components within the satcom system. Waveguide bends are curved sections that enable changes in direction while maintaining wave propagation and brackets/mounts are used to hold it in place and ensure stability during operation. Loads absorb any excess power at the end of the waveguide to prevent reflections. The couplers allow coupling of power between two waveguides and splitters distribute the signal to multiple outputs while maintaining performance. Attenuators measure and control signal loss within the waveguide. Each component plays a vital role in ensuring efficient wave propagation, minimizing losses, and maintaining the desired performance of the waveguide run.
- Keywords
-
- FOR TELECOMMUNICATIONS
- AERIALS
- RADIO NAVIGATIONAL AID APPARATUS
- METAL
- FOR TRANSMISSION VIA SATELLITE
- PARTS
- OF COPPER
- NAVIGATION EQUIPMENT
- Justification
- Classification has been determined in accordance with the following: For the purposes of determining the commodity codes within which goods most appropriately fall, reg 3 (1) of The Customs Tariff (Establishment) (EU Exit) Regulations 2020 sets out that the rules of interpretation contained in the following have effect – a. Part Two (Goods Classification Table Rules of Interpretation) of the Tariff of the United Kingdom (Reg 3(1)(a)); and b. Notes to a section or chapter of the Goods Classification Table (Reg 3(1)(b)). General interpretative rules (GIR)s: GIR 1 - has been used to classify this product by the terms of heading 8529 - Parts suitable for use solely or principally with the apparatus of headings 8524 to 8528 GIR 6 has been used to classify this product to subheading level 852910 - Aerials and aerial reflectors of all kinds; parts suitable for use therewith 8 Digit Code 85291095 - Other than aerial filters and separators Also classified in accordance with: Harmonized System Explanatory Notes (HSENs) to heading 8529