What is it about?

Microwave and millimeter wave active and passive circuits are widely used in many communication systems and sub-systems. We may use different technologies such as CMOS technologies to realize and fabricate the millimeter wave and microwave active circuits.

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Why is it important?

As the capacity and speed of communication system increase in order to transmit higher data rate information the need to increase the carrier frequency also increases. So to fulfill this requirement, we should use the millimeter wave band


A planar DC‐blocker suitable for differential mode signaling applications is designed and fabricated. The theory of this component is explained in a new form which utilizes the wave scattering transfer matrix. The proposed interpretation of the transfer matrix is most suitable for series (cascade) elements like DC‐blockers. In addition to the theoretical enhancement,design of a compressed balanced DC‐blocker inserted through a shielded broadside coupled stripline (SBCSL) transmission line is presented. The return loss of better than 10 dB is obtained at 50‐ohm differential‐mode input ports of the fabricated DC‐blocker in the entire frequency range of 5.6‐8.4 GHz

Mahmoud Mohammad-Taheri
School of Electrical and Computer Engineering, College of Engineering, University of Tehran

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This page is a summary of: Theory and design of a phase-inverted balanced coupled-line DC-blocker, IET Microwaves Antennas & Propagation, March 2019, the Institution of Engineering and Technology (the IET),
DOI: 10.1049/iet-map.2018.5580.
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