4–40 GHz MMIC distributed active combiner with 3 dB gain

Majidi-Ahy, R.; Nishimoto, C.; Russell, J. J.; Ou, Weiming; Bandy, S.; Zdasiuk, G.; Shih, C.; Pao, Y.C.; Yuen, C.

doi:10.1049/el:19920468

Cited by 19 publications

(3 citation statements)

References 3 publications

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“…However, among all functionalities, dividing and combining structures seem to be most often replaced by their active counterparts. Many examples of in-phase broadband power combiners, also indicated as Split-Gate line Distributed Amplifier (SGDA) are accounted [7][8][9]; by simply swapping input for output, Split-Drain line Distributed Amplifier (SDDA) is achieved [7] thus enabling for the dual operation.…”

Section: Introductionmentioning

confidence: 99%

Distributed active balun with improved linearity performance

Palomba

Palombini

Colangeli

et al. 2015

2015 German Microwave Conference

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A new active balun topology is introduced allowing to overcome gain and bandwidth limitations of traditional out-of-phase power dividers. Proposed architecture employs distributed circuits as Artificial Transmission Line Pair (ATLP) and Split Drain Distributed Amplifier (SDDA) for achieving a broadband signal balancing and featuring a positive insertion gain too. In this contribution a complete theoretical analysis for the ATLP and SDDA principle of operation is provided together with the description of the actual design flow. MMIC test vehicle operating on the multi-octave frequency range 2-18 GHz proves the effectiveness of presented topology

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Section: Introductionmentioning

confidence: 99%

Distributed active balun with improved linearity performance

Palomba

Palombini

Colangeli

et al. 2015

2015 German Microwave Conference

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“…It is noteworthy that the distributed architecture can also be adopted in other circuits to achieve broad bandwidth [7]. Examples include oscillators [8], power amplifiers [9], [10], mixers [11], phase shifters [12], as well as power combiners and splitters [13], [14]. Transversal filters are another important circuit type that has been implemented using distributed architectures for application in broadband optical communications [15], [16].…”

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confidence: 99%

The (R)evolution of Distributed Amplifiers: From Vacuum Tubes to Modern CMOS and GaN ICs

2018

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I. INTRODUCTION B ROADBAND amplification of signals is desirable in many applications such as high-speed data communications, high-resolution imaging systems, optoelectronics and instrumentation systems. Wide bandwidth is one of the prominent factors to be considered in designing such a system since it determines ability of the system for transferring highdata-rate information, transmitting/receiving short pulses, or processing wideband signals. Designing broadband amplifiers has always been challenging. The ever-increasing demand for higher data-rates and low energy consumption in next generation communication systems further complicates the design of broadband amplifiers. Distributed amplifiers (DA), also known as travelling-wave amplifiers (TWA), are one of the most popular broadband amplifier architectures. The DA architecture was originally patented by Percival in 1936 [1] and later elaborated by Ginzton in 1948 [2]. The early DAs were implemented using vacuum tube technology. One of the first vacuum tube DAs fabricated in 1950 is shown in Fig. 1. The amplifier included three type 807 tubes and 482-Ω plate and grid lines. The amplifier achieved a gain of 11 dB, bandwidth of 100 Hz to 300 MHz, and a typical output power of 15 W [3]. The first Monolithic Microwave Integrated Circuit (MMIC) DA was demonstrated by Ayasli in 1982 [4] using a Gallium Arsenide (GaAs) MESFET technology. The amplifier, shown in Fig. 2, included four transistors with 1-µm gate length and 50-Ω input and output lines. It achieved 9-dB gain and 1-13 GHz bandwidth. GaAs remained the main technology for design of DAs until the inception of the first Indium Phosphide (InP) DA in 1990 [5] with an impressive bandwidth of 5-100 GHz. GaAs and InP semiconductor technologies have been predominantly employed in implementation of DAs. These technologies provide superior performance resulting from their high electron mobility, high saturated electron velocity, high breakdown voltage, and high-resistivity substrate. The later contributes to availability of low-loss integrated passive elements. The market demands for low cost, small size, and low power consumption of electronic systems has motivated researchers to develop techniques to implement distributed amplifiers using mainstream CMOS technologies. The first integrated CMOS DA was presented by Kleveland in 1999 [6]. Recently,

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“…Typical applications of CPW include millimeter-wave amplifiers [10][11][12], active combiners [13], frequency doublers [14], mixers [15], filters [16][17][18][19][20], microelectromechanical systems switches [21], thin film high-temperature superconducting tunable circuits and components [22], photonic bandgap structures or electromagneticbandgap (EBG) structure [23,24], printed antennas [25] and so on.…”

Section: Motivationmentioning

confidence: 99%

Fullwave modeling of coplanar-waveguide discontinuities for applications in filter design and metamaterial characterization

Gao¹

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Coplanar waveguide (CPW) has been finding wide applications in microwave integrated circuit (MIC) and monolithic microwave integrated circuit (MMIC) due to several advantages it offers over microstrip lines. Typical discontinuities characteristics are an integral part of practical circuit design. Therefore, a good understanding of their circuit behavior is essential for design success. In the past few decades, great effort has been made to accurate characterization of a variety of CPW circuits and discontinuities by developing different advanced fullwave approaches, of which the method of moments (MoM) has been considered as the most efficient and powerful algorithm. In this way, several commercial MoM simulators have been explored in the recent years for direct simulation and optimization of a large number of CPW circuit blocks with complicated configurations. However, such a direct approach requires the intensive CPU time and huge memory thus preventing one from physical insight into the operation principle of the whole CPW circuit block. Therefore, it is preferred to formulate the equivalent circuit models for many CPW elements such that the optimization can be executed via resultant network topology. The main goal of this thesis is to investigate various CPW discontinuities for CPWbased filter design and metamaterial characterization. To accomplish this task, the hybrid fullwave approach based on the method of moments (MoM) and short-open calibration (SOC) procedure, namely, MoM-SOC technique is firstly employed via two-port CPW discontinuity to extract equivalent circuit network parameters, i.e., Y-or

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4–40 GHz MMIC distributed active combiner with 3 dB gain

Cited by 19 publications

References 3 publications

Distributed active balun with improved linearity performance

Distributed active balun with improved linearity performance

The (R)evolution of Distributed Amplifiers: From Vacuum Tubes to Modern CMOS and GaN ICs

Fullwave modeling of coplanar-waveguide discontinuities for applications in filter design and metamaterial characterization

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