90cm Dish Prime Focus

The phrase "90cm dish prime focus" refers to a satellite antenna where the signal is focused directly in the center of the parabolic reflector. While historically significant, market data indicates that for the 90cm size class, the industry has largely shifted toward offset designs due to superior efficiency and signal gain AlibabaAlibaba.

Market Trends & Dynamics

* Technological Shift: In the 90cm range, offset dishes are now the market standard. In a 90cm prime focus setup, the LNB and its support arms block a significant percentage of the reflector's surface area (the "central shadow"), which drastically reduces gain compared to larger prime focus dishes (e.g., 180cm+) where the obstruction is negligible AlibabaOffsetantenna.

* Application Niche: 90cm dishes are primarily used for Ku-band Direct-to-Home (DTH) services. For these higher frequencies, surface accuracy and lack of obstruction are vital, favoring offset designs Alibaba. Prime focus designs remain relevant only for larger diameters (>1.2m) specifically used for C-band reception Alibaba.

* Consumer Preference: Modern consumers prioritize ease of installation and weather resistance. Offset dishes are easier to mount on walls and their vertical tilt prevents rain/snow accumulation, a common point of failure for the upward-facing "bowl" of a prime focus dish LemmymorganOffsetantenna.

Technical Comparison: Prime Focus vs. Offset (90cm)

Sourcing Insights

Currently, finding a true "90cm prime focus" dish for standard consumer TV is rare, as most suppliers list 90cm offset antennas as the functional replacement for this size category AlibabaAlibaba.

* Standard Pricing: 90cm Ku-band offset dishes range from $9.80 to $10.80 per set for bulk orders (MOQ 200+) Alibaba.

* Top Suppliers: Major manufacturers like Sanwei Communication and Anhui Bowei dominate the export market for 90cm satellite antennas, focusing on steel or aluminum offset designs for the global TV receiver market AlibabaAlibaba.