A novel, multi-octave differential (180 °) power divider is described. The power divider circuit is based on a new kind of Magic-T circuit composed of a balun and two parallel coupled transmission lines. Results show that the proposed Magic-T circuit can achieve octave bandwidth with excellent isolation and balance. This fundamental Magic-T block is then used to create a multi-section 180 ° power divider capable of multi-octave performance. A 2-12 GHz, 7-section design is experimentally evaluated which exhibits excellent performance in terms of isolation, return loss, insertion loss and amplitude/phase balance.

The AMZ-40 is a broadband amplifier with applications in high speed fiber optics and pulse amplification. This manual describes the ON/OFF biasing procedure and shows typical eye diagrams at 40 Gb/s.

Read Christopher F. Marki's UC San Diego Ph.D. thesis dissertation. Topics include fiber-optic communication systems, Rayleigh backscattering noise, high data rate communication, noise mitigation through DC blocking and RF filtering, and a review of some common modulation formats in optical systems (NRZ, RZ, and Duobinary). Many of the results obtained in this work were enabled using Marki Microwave components including highpass, lowpass and bandpass filters, power dividers, amplified doublers and quadruplers, DC blocks, bias tees, mixers, and millimeter wave amplifiers.

This white paper is a prerequisite mixer tutorial for anyone interested in learning about RF and microwave mixers. Fundamental mixer topics covered include up/downconversion, nonlinear versus commutating mixing, mixer balance, conversion loss, isolation, 1 dB compression point, VSWR, mixer noise figure, single tone spurious response, and multi-tone intermodulation distortion.

The T3 mixer is the most sophisticated mixer in the world and offers unprecedented performance compared to legacy double balanced and triple balanced RF mixer designs. This tutorial describes the novel attributes of the T3 with particular focus on key features such as broadband MHz to GHz conversion loss response, extremely linear performance (in terms of single tone spurious and multi-tone input intercept point), high 1 dB compression point, LO drive flexibility and optimization with a square-wave LO drive waveform.

Wavefade^TM filters are proprietary absorptive (i.e. endlessly 50 ohm) lowpass filters that offer superior, ultra-flat group delay response while maintaining quasi-Bessel magnitude response. This paper describes the key features of the Wavefade^TM and shows how this filter is ideal for applications in filter pulsed waveforms where phase/group delay response is critical.