Streamlining PCB Design With Crossovers For High-Frequency Applications
By Peter Matthews
As routing and signal integrity challenges grow in complexity, multilayer printed circuit boards (PCBs) are increasingly used to manage radio frequency (RF) and digital traces across different layers. However, the cost and complexity of multilayer designs can outweigh their benefits, especially at high frequencies where manufacturing costs escalate. For instance, when designing a tile phased array, the tight λ/2 pitch limits component space, complicating the layout.
Surface-mount crossovers present a single-layer alternative, but most currently available options operate below 6 GHz, making them less suitable for high-frequency applications. To address this gap, Knowles Precision Devices has developed a broadband RF crossover that operates from DC to 40 GHz, catering to applications in the X, Ku, K, and KA bands, which include advanced RF technologies, high-speed communications, and radar systems.
This innovative crossover device features a compact form factor, measuring just 0.15” x 0.10” x 0.02”. It reduces layer count and construction costs while simplifying PCB signal routing. By minimizing voltage standing wave ratio (VSWR) issues that can arise from routing shifts across the board, these crossovers enhance throughput in communication applications and improve resolution in radar technologies.
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