These doublers offer extremely high suppressions, small size, repeatability, scalable cost, and excellent lead time/availability for higher volume applications. Marki develops MMIC and Microlithic® doublers using full electromagnetic and circuit based non-linear optimization. Our MMIC doublers are fabricated with precise tolerance on a GaAs substrate with high speed Schottky diodes. MMIC/Microlithic® chip/module doublers are designed as a small form factor chip. This chip is also packaged into a module that is suitable for high performance laboratory use or as an eval module with equivalent performance as the chip.

Our surface mount MMIC doublers package our optimized chips into industry standard ceramic QFN packages. These affordable packages offer good electrical performance to 30 GHz while also providing proven high reliability. Surface mount Microlithic® doublers are based on chip designs, but use integrated surface mount transitions that operate up to 32 GHz. Eval modules of both MMIC and Microlithic® surface mount doublers are available.

Our active doublers and quadruplers integrate amplifiers with our doublers, creating an integrated LO multiplier chain in a single module. They are a convenient alternative to expensive synthesizers for use in the laboratory or bolt together systems.

Non-Linear Transmission Lines (NLTL) are a superior method of comb generation compared to SRDs, providing lower residual phase noise, lower required input power, and higher harmonic generation.

Developed in response to the recent advancement of 5G mobile communications bands, the NLTL-6275 is capable of generating a tone at 80 GHz with more than -20 dBm using a +20 dBm input at only 5 GHz. Now anyone with a simple low frequency synthesizer is capable of generating mm-wave tones for test and measurement applications. Our low frequency NLTL-6273SM was created to be the world’s smallest surface mount NLTL, ideal for RF synthesizer modules.

Each Marki NLTL is fabricated with GaAs Schottky varactor diodes providing low cost, conversion-efficient comb generation with “near ideal” 20logN phase noise performance. Applications include Phase Locked Loops (PLL), Built-in-Test (BIT) oscillators, digitizing oscilloscopes, jammers, antenna testing, and millimeter wave frequency generation.

Marki’s legendary hybrid doublers offer low conversion loss, high suppressions, and low drive capability across incredible bandwidths. While they have been surpassed in suppression performance by MMIC and Microlithic® designs in smaller form factor chip and surface mount packages, legacy mixer connectorized modules are still a sound choice for legacy systems and laboratory use.