Description

The Circular Wave Guide Despazable is a precision-engineered adjustable feedhorn and waveguide section designed specifically for use with prime focus satellite LNBs on large (1.8 m and 2.4 m) prime focus dishes. This bespoke component helps guide and position microwave signals from the dish reflector to the LNB feed, improving signal capture and alignment compared with standard fixed waveguide interfaces. Similar feedhorn accessories are used to optimise reception on prime focus dishes by directing the RF energy into the LNB feed neck with minimal signal loss — an especially important factor when receiving signals at high satellite frequencies (10.7-12.75 GHz).

Frequently Asked Questions (FAQ)

Q: What is a Circular Wave Guide Despazable?
A: It’s an adjustable circular waveguide and feedhorn assembly used to focus and guide microwave signals from a prime focus dish reflector to the LNB’s feed point. As a precision RF accessory, it helps improve signal directionality and reduces losses at Ku-band frequencies.

Q: What is it designed for?
A: This product is made specifically for prime focus satellite LNBs used on large dishes (e.g., 1.8 m and 2.4 m diameter). It helps align the waveguide feed to the prime focus of the dish to ensure optimal signal capture. This is similar in concept to feedhorns used with C120 flange LNBs on prime focus antennas.

Q: What frequency range does it support?
A: The component supports microwave satellite frequencies in the Ku-band (10.7 – 12.75 GHz), making it suitable for a wide range of satellite reception applications requiring low loss and high directionality.

Q: Why would I need an adjustable waveguide feedhorn?
A: When installing a prime focus antenna, precise alignment of the feedhorn and waveguide relative to the dish’s focal point significantly affects signal strength and quality. An adjustable waveguide feedhorn lets installers fine-tune this alignment and achieve better performance than a fixed feed section — particularly for weak or distant satellite signals.

Q: How does it improve performance?
A: By offering a precise, adjustable RF path between the dish and the LNB, this waveguide accessory reduces signal loss and reflections, leading to stronger reception, better C/N (Carrier-to-Noise) ratios and improved overall satellite signal fidelity compared with generic fixed feeds.

Satellite installers and enthusiasts often pair an adjustable waveguide feedhorn like the Circular Wave Guide Despazable with their prime focus LNB on large dishes to fine-tune alignment for weak geostationary satellites, boost signal strength on fringe footprints, or optimise multi-LNB, dual polarity, or multi-output installations. For example, when setting up a 2.4 m dish to capture faint international broadcasts, this waveguide helps ensure the dish’s entire signature is directed into the LNB, leading to clearer reception of HD channels and fewer signal drops.