An 18–50-GHz Double-Balanced GaAs Mixer Using Novel Ultrawideband Balun

He, Ding; Yu, Minyuan; Li, Jiaxuan; Yu, Zhongjun

doi:10.1109/lmwt.2023.3242336

Cited by 6 publications

(5 citation statements)

References 15 publications

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“…According to the analysis in Section 2 , another pressing disadvantage of the conventional dual-coupled line structure is that it cannot be directly applied in compact applications due to the presence of quarter-wavelength lines, which occupy a large circuit area, especially at low frequencies. Fortunately, researches [ 23 , 24 , 25 ] have shown that the ATL concept is applicable to reduce the physical size of planar circuits. Therefore, in order to adequately reduce the size of the proposed 180° phase shifter, we convert the transmission line in Path 2 of Figure 1 c into ATL form, as shown in Figure 5 .…”

Section: Analysis Of the Proposed Technologies In Novel 180° Phase Sh...mentioning

confidence: 99%

Compact Bandwidth-Enhanced 180-Degree Phase Shifter Using Edge-Coupled Multi-Microstrip and Artificial Transmission Line

He,

Fan,

Zhu

et al. 2023

Micromachines

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Compactness has obtained sufficient importance in wideband phase shifter design considerations, as it is directly related to fabrication cost. In this paper, a novel structure was presented to create compact broadband 180-degree phase shifter, which has the advantages of enhanced bandwidth and significantly reduced chip area. The proposed configuration consists of edge-coupled multi-microstrip lines (ECMML) and an artificial transmission line (ATL) with dual-shorted inductors, both of which have the periodic shunt load of capacitors. The ECMML can provide a high coupling coefficient, leading to an increase in the bandwidth, while the introduced capacitors can greatly reduce the line length (35.8% of the conventional method). To verify the relevant mechanisms, a wideband switched network with compact dimensions of 0.67 × 0.46 mm2 was designed via 0.15-micrometer GaAs pHEMT technology. Combined with the measured switch transistor, it was shown that the proposed phase shifter exhibits an insertion loss of less than 2 dB, a return loss of greater than 12 dB, a maximum phase error of less than 0.6° and a channel amplitude difference of less than 0.1 dB in the range of 10 to 20 GHz.

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Section: Analysis Of the Proposed Technologies In Novel 180° Phase Sh...mentioning

confidence: 99%

Compact Bandwidth-Enhanced 180-Degree Phase Shifter Using Edge-Coupled Multi-Microstrip and Artificial Transmission Line

He,

Fan,

Zhu

et al. 2023

Micromachines

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“…Since S e22 = 0 in accordance with (7), to meet the port matching, the following equation should be satisfied:…”

Section: Analysis Of the Proposed Btu Filtering Power Dividermentioning

confidence: 99%

“…Subsequently, balanced circuits are becoming more widely used in RF and microwave systems because they have the advantages of high immunity to environmental noise, good common-mode suppression (CMS), and low electromagnetic interference, compared with the single-end counterparts. Due to these benefits, a large number of balanced circuits have been proposed, such as balanced filters [2][3][4][5], balanced amplifiers [6], and balanced mixers [7]. In addition, the balanced power dividers have been attracting more and more attention [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A Novel Balanced-to-unbalanced All-port Reflectionless Filtering Power Divider without Loading Additional Absorptive Branches at Input and Output Ports

Chen,

Zhang,

Wang

et al. 2023

PIER M

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A novel balanced-to-unbalanced (BTU) all-port reflectionless filtering power divider without loading additional absorptive branches at input and output ports is proposed in this paper. The proposed power divider includes two reflectionless filtering networks, four transmission lines, a phase inverter, and two isolation resistors. Unlike the existing filtering power dividers that require additional absorptive branches to be loaded at each port to achieve reflectionlessness at all ports, the proposed power divider achieves all-port reflectionlessness by embedding only two reflectionless filtering networks in the BTU power dividing circuit. Meanwhile, this reflectionless filtering network also introduces two transmission zeros located at the lower and upper sides of the passband, respectively, for high selectivity. To validate the proposed power divider topology, a 2.0-GHz BTU filtering power divider is designed and fabricated with a 3-dB filtering bandwidth of 40.1%. The 10-dB reflectionless bandwidth for the balanced port is 98.7% from 0.940 to 2.772 GHz and that for the unbalanced ports covers the entire measurement frequency from 0.5 to 3.5 GHz, achieving good all-port reflectionless characteristics.

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“…As one of the essential components of RF communication front-ends, high-performance mixers are widely demanded to economically and efficiently operationalize the up/down spectrum shifting functions of signals. There are various circuit topologies and electrical configurations for mixers, which are commonly categorized into two groups, the active type [ 5 , 6 , 7 , 8 , 9 ] and passive type [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ], further classified as single-ended, single-balanced, double-balanced, triple-balanced, and subharmonic approaches. In addition, the specific selection criteria should be determined based on system specifications, including operating bandwidth, conversion loss, port isolation, and compactness [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, it consists of two sets of λ/4 coupled lines and thus consumes more area. Study [ 16 ] proposed a novel multi-conductor coupled-line (MCL) balun (shown in Figure 1 b), which can achieve superior amplitude/phase balance performance and effectively reduce the balun size. However, the periodic open stubs employed in the artificial transmission line are unfavorable for layouts in low-frequency situations due to the inability to be folded.…”

Section: Introductionmentioning

confidence: 99%

Modified Broadband Ruthroff-Type Transmission Line Transformer Balun for Isolation-Enhanced Passive Mixer Design

He,

Yu,

Chen

et al. 2024

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Generalized broadband operation facilitates multifunction or multiband highly integrated applications, such as modern transceiver systems, where ultra-wideband bidirectional passive mixers are favored to avoid a complex up/down-conversion scheme. In this paper, a modified Ruthroff-type transmission line transformer (TLT) balun is presented to enhance the isolation of the mixer from the local oscillator (LO) to the radio frequency (RF). Compared to the conventional methods, the proposed Ruthroff-type architecture adopts a combination of shunt capacitors and parallel coupled lines to improve the return loss at the LO port, thus effectively avoiding the area consumption for the diode-to-balun impedance transformation while simultaneously providing a suitable point for IF extraction. In addition, a parallel compensation technique consisting of an inductor and resistor is applied to the RF balun to significantly improve the amplitude/phase balance performance over a wide bandwidth. Benefiting from the aforementioned operations, an isolation-enhanced 8–30 GHz passive double-balanced mixer is designed as a proof-of-principle demonstration via 0.15-micrometer GaAs p-HEMT technology. It exhibits ultra-broadband performance with 7 dB average conversion loss and 50 dB LO-to-RF isolation under 15 dBm LO power. The monolithic microwave integrated circuit area is 0.96 × 1.68 mm2 including all pads.

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An 18–50-GHz Double-Balanced GaAs Mixer Using Novel Ultrawideband Balun

Cited by 6 publications

References 15 publications

Compact Bandwidth-Enhanced 180-Degree Phase Shifter Using Edge-Coupled Multi-Microstrip and Artificial Transmission Line

Compact Bandwidth-Enhanced 180-Degree Phase Shifter Using Edge-Coupled Multi-Microstrip and Artificial Transmission Line

A Novel Balanced-to-unbalanced All-port Reflectionless Filtering Power Divider without Loading Additional Absorptive Branches at Input and Output Ports

Modified Broadband Ruthroff-Type Transmission Line Transformer Balun for Isolation-Enhanced Passive Mixer Design

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