K-Band CMOS Sub-Harmonic Resistive Mixer With a Miniature Marchand Balun on Lossy Silicon Substrate

A wideband Gilbert cell mixer with an integrated Marchand balun using 0.5‐μm GaAs enhancement‐mode pHEMT technology

“…Recent development of CMOS RFIC mixers, such as a 28 GHz pumped mixer [1], a 32-70 GHz distributed mixer [2], a 24 GHz doublebalance mixer [3], and a 18-26 GHz resistive mixer [4], using sub-harmonic down conversion technique make the broadband application up to millimeter wave range possible. For differential mode application, the Gilbert-based mixers have been demonstrated with SiGe bipolar and GaAs HBT technologies [5][6][7][8].…”

A low local oscillator power K‐band mixer based on tunneling diodes

“…Additionally, multiband filters with compactness have been studied extensively as a key circuit block in the wireless communication systems. Several types of dual-band bandpass filters (BPFs), such as the cascaded connection of bandpass and bandstop sections [1], coupled stepped impedance resonators (SIRs) [2][3][4]7] and combination of two or more individual resonators [5][6][7]. In the sensitive receiver, the requirement of the high-performance filter also needs a broad upper rejection band to reduce the interference from out of-band signals [8 -10].…”

“…Therefore, to design a dual-band BPF with compact size and wide stopband simultaneously is still a challenge for the circuit designers. In past, dual-band BPFs have been implemented by shifting the higher-order frequency of the SIRs to the desired second passband [2][3][4]7]. However, the above dual-band filters are still have higher insertion loss with about 3 dB or more than 3 dB because of the use of two-step discontinuities of the conventional SIR [2].…”

Design and Analysis of Millimeter-Wave Marchand Balun with Interconnected Transmission Line

“…Various balun configurations have been used for applications in monolithic microwave integrated circuits (MMICs) and millimeter-wave circuits [1][2][3][4][5][6][7][8][9]. Conventional transformers have been used as baluns.…”

“…The main disadvantage of this structure is the relatively large dimensions at lower gigahertz frequencies. In recent years, spiral-type Marchand baluns have been reported due to its compact layouts and increased mutual coupling [6][7][8]. In order to improve the performance of the Marchand balun, multiconductor coupled lines have been used to achieve high coupling coefficient in the planar structure [9].…”