The demand for information (data, video, and voice) through wireless devices such as smartphones, tablets, and mobile computers is projected to grow significantly over the next few years. As a result of this demand, bandwidth and capacity are becoming more limited in an already congested spectrum. The wireless industry is responding to this challenge by migrating from a macro-cell architecture, where a few high-power base stations serve a large geographical area, to a new model that uses many small-cells.
While small-cells only cover a small area, when grouped together, they provide the necessary coverage and increase capacity at the same time. Air-cavity filters have been the prime choice for macro-cells topology for their superior overall performance and power handling. However, air-cavity filters are large, heavy, and expensive, which are not ideally suited for small-cell applications. Design engineers must find a solution that can maintain a high level of performance while offering other critical benefits such as space and cost savings.
The ClearPlex® Waveguide Ceramic Filters from CTS offer this solution. ClearPlex waveguide technology takes advantage of patented mechanical structures and proprietary high quality ceramic formulations. It offers a filtering solution that satisfies the market’s needs for low cost, small size, and superior electrical performance. The filters operate in UMTS Bands 1, 2, 4, 7, and 25 with additional options available on request. They can handle up to 50 watts of average power and peak power of 500 Watts. They are sealed and humidity tolerant with a Q Factor 30% greater than a ceramic monoblock filter. The filters have a low insertion loss and sharp rejection points with PIM under -110 dBm.
