Search results for: Kaixue Ma

Items from 1 to 20 out of 198 results

article

A high linearity 0.05–7 GHz digital step attenuator with the capacitive compensation for bonding wires parasitic parameters

Haipeng Fu, Jiqing Tao, Jianquan Hu, Keping Wang, more

Microwave and Optical Technology Letters > 66 > 1 > n/a - n/a

This paper presents a broadband, high linearity 7‐bit digital step attenuator (DSA) using a low‐cost bonding wire package. Capacitive compensation technique is proposed to offset the deterioration of attenuation accuracy and operating bandwidth caused by the parasitic parameters of the bonding wire and switching transistors. And the negative voltage bias technique (NVBT) is proposed to improve the...

article

Slow‐wave substrate integrated suspended parallel strip line and its application to rat‐race coupler

Huajiao Shen, Yongqiang Wang, Fanyi Meng, Kaixue Ma

Microwave and Optical Technology Letters > 65 > 12 > 3196 - 3203

This paper presents a slow‐wave substrate integrated suspended parallel strip line (SW‐SISPSL) for the first time. The slow‐wave effect is produced by cascading high/low‐impedance SISPSL in the meander line configuration. Different from conventional single‐ended slow‐wave transmission lines, the proposed SW‐SISPSL supports differential signal transmission. The characteristic impedance and slow‐wave...

article

A negative‐resistance oscillator using dual‐cavity based on SISL technology

Jingwen Han, Kaixue Ma, Ningning Yan

Microwave and Optical Technology Letters > 65 > 10 > 2710 - 2715

This article presents a low‐phase noise negative resistance oscillator using the dual‐cavity resonator (DCR) based on substrate integrated suspended line (SISL) technology. Two air cavities are stacked without increasing the footprint areas of the oscillator. A coupling hole is introduced to realize weak coupling between the two air cavities. The DCR can enhance the roll‐off of the equivalent resonator...

article

A 34.16–39.6 GHz low phase noise VCO for frequency‐modulated continuous‐wave radar in a 28‐nm CMOS

Haipeng Fu, Fenglin Yuan, Kaixue Ma

Microwave and Optical Technology Letters > 65 > 10 > 2763 - 2771

A dual‐core voltage‐controlled oscillator (VCO) using harmonic resonance is presented in this letter. Without an additional switch capacitor bank, harmonic resonance implemented in VCO is realized by only a single control voltage, satisfying the requirement of frequency‐modulated continuous‐wave radar. Two pairs of varactors are added to the transformer‐based tank, which ensures a constant ratio between...

article

A wideband transition from substrate integrated suspended parallel strip line (SISPSL) to differential shielded GCPW

Jia Liu, Yongqiang Wang, Kaixue Ma, Wenxing An

Microwave and Optical Technology Letters > 65 > 7 > 1952 - 1958

In this paper, a novel wideband substrate integrated suspended parallel strip line (SISPSL) to differential shielded grounded coplanar waveguide (GCPW) transition is proposed. By embedding the traditional double‐side parallel‐strip line inside multilayer boards, SISPSL has the advantage of self‐packaging and there is almost no radiation loss. SISPSL has inherent differential transmission properties,...

article

A compact low‐pass filter using a miniaturized capacitor and honeycomb cavity on substrate integrated suspended line platform

Haiyang Zhang, Yongqiang Wang, Kaixue Ma

Microwave and Optical Technology Letters > 65 > 7 > 1843 - 1849

This article proposes a compact low‐pass filter (LPF) using a miniaturized capacitor, and honeycomb cavity based on the substrate integrated suspended line platform. A new method for miniaturizing capacitors is proposed, and simultaneously honeycomb cavities are adopted to extend the stopband. As a design case, a seven‐order quasi‐lumped‐element LPF with a cutoff frequency of 0.6 GHz is designed,...

article

Synthesis design of quad‐band bandpass filter with mixed frequency transformation method

Yi Wu, Kaixue Ma, Yongqiang Wang

Microwave and Optical Technology Letters > 65 > 6 > 1629 - 1634

This paper presents an analysis method to design quad‐band bandpass filters (BPFs) based on the mixed frequency transformation method. The frequency mapping technique is employed to obtain the design parameters by defining the frequency ranges of each passband. By using the proposed approach, the resonant angular frequencies and susceptance slope parameters can be obtained analytically. To validate...

article

Design of a wide beamwidth spherical conformal antenna array for ship‐borne applications

Yu Luo, Guangying Zhao, Ningning Yan, Wenxing An, more

Microwave and Optical Technology Letters > 65 > 3 > 921 - 929

This study presents the phase setting method for a spherical conformal antenna array to achieve a wide beamwidth circularly polarized radiation pattern. A dodecahedral spherical array was fabricated and measured to validate the phase setting method. The array adopts a regular dodecahedron spatial distribution structure composed of 11 dual‐polarization elements. By exciting 11 elements simultaneously...

article

An active‐passive cascaded bandpass filter with an 88 kHz–1.1 GHz bandwidth on substrate‐integrated suspended line platform

Zhuojun Yang, Kaixue Ma, Yongqiang Wang, Ningning Yan

Microwave and Optical Technology Letters > 65 > 2 > 541 - 547

This letter proposes an active‐passive cascaded bandpass filter based on the substrate‐integrated suspended line platform for the first time. By cascading an active‐RC highpass circuit with a passive‐LC lowpass filter circuit, the proposed filter achieves a GHz bandwidth, an extremely low cut‐off frequency, and a controllable in‐band gain. It has the advantages of compact size, DC‐offset cancellation,...

article

A 4.5–7.5 GHz highly integrated transceiver front‐end for UWB application

Jianquan Hu, Kaixue Ma

Microwave and Optical Technology Letters > 65 > 2 > 441 - 446

In this letter, a 4.5–7.5 GHz highly integrated transceiver front‐end, incorporating two single‐pole three‐throw (SP3T) transmit/receive (T/R) switches, a low‐noise amplifier (LNA), a power amplifier (PA), and a bypass path for UWB positioning and communication systems applications, is reported. The mode switches among transmitting, receiving, and bypass are achieved by utilizing two control voltages...

article

A novel self‐packaged DBBPF with multiple TZs for 5G sub‐6 GHz applications

Hao Zhang, Kaixue Ma, Wenwen Zhang, Ningning Yan

Microwave and Optical Technology Letters > 65 > 1 > 62 - 68

In this article, we proposed a self‐packaged dual‐band bandpass filter (DBBPF) with high isolation and low insertion loss (IL) for 5G sub‐6 GHz applications. To get high stopband suppression, multiple and controllable transmission zeros (TZs) are introduced. A pair of quarter‐wavelength stepped‐impedance resonators (QSIRs) and half‐wavelength hairpin resonators (HWHR) are introduced to form a cross‐coupled...

article

Analysis and design of a 1.7‐ to 27.1‐GHz low‐noise amplifier

Jianquan Hu, Kaixue Ma

Microwave and Optical Technology Letters > 65 > 1 > 28 - 35

This letter illustrates a 1.7‐ to 27.1‐GHz single‐stage cascode low‐noise amplifier (LNA) with high and flat gain response. In the presented LNA, to obtain high and flat gain response in the broad bandwidth, the Micro‐strip type pHEMT is utilized as the common‐source stage so as to alleviate the gain bandwidth degradation caused by parasitic parameters. Meanwhile, multiple inductive‐peaking inductors...

article

FR‐4‐based Ka‐band SISL bandpass filters using folded half‐wavelength resonators

Zehua Yue, Kaixue Ma, Yongqiang Wang

Microwave and Optical Technology Letters > 65 > 1 > 104 - 108

In this letter, bandpass filters (BPFs) with folded short‐circuited half‐wavelength (λ/2) resonators are proposed based on the substrate integrated suspended line (SISL) platform for satellite communications. Each λ/2 resonator is folded, to achieve an overlapping structure, which not only reduces the size, but more importantly, reduces the loss. In addition, air cavity, metal shielding wall, and...

article

A sequentially rotated feeding circularly polarized stacked patch antenna array based on SISL

Ningning Yan, Doudou Song, Yu Luo, Kaixue Ma

Microwave and Optical Technology Letters > 65 > 1 > 256 - 263

A sequentially rotated feeding circularly polarized stacked patch antenna and its array based on substrate integrated suspended line (SISL) are presented. The resonant frequencies of 5.05 and 5.35 GHz are obtained by using the cross slot on the driven patch, which can also realize circular polarization. The windmill stacked patch is introduced to generate another resonant frequency of 5.85 GHz and...

article

A single‐layer high‐isolation multiple‐input‐multiple‐output antenna for millimeter wave applications

Sheng Xie, Yuyuan Fan, Yu Luo, Kaixue Ma

International Journal of RF and Microwave Computer‐Aided Engineering > 32 > 12 > n/a - n/a

This paper presents a method for simultaneously improving the matching and the isolation of multiple‐input‐multiple‐output (MIMO) antenna arrays. A two‐element array with substrate integrated waveguide (SIW) structure and vias are designed to improve impedance matching and isolation without using traditional matching networks. The SIW structure consists of metal vias surrounding around three sides...

article

A circuit‐based neuro‐space mapping technique for small‐signal modeling of multi‐gate GaN HEMT switches

Zhifu Hu, Weicong Na, Meilin He, Ruicong He, more

International Journal of RF and Microwave Computer‐Aided Engineering > 32 > 11 > n/a - n/a

GaN HEMT switches has become more and more important in RF front‐end. This article proposes a circuit‐based neuro‐SM technique for the small‐signal modeling of multi‐gate GaN HEMT switches for the first time. A general equivalent circuit model for multi‐gate switch HEMT is proposed using the cascaded single‐gate switch HEMT model to represent the tendency rather than the exact behaviors of the small‐signal...

article

A tunable reflection‐type filtering phase shifter using SISL technology

Jianteng Yang, Kaixue Ma, Haipeng Fu, Yongqiang Wang, more

Microwave and Optical Technology Letters > 64 > 11 > 1972 - 1977

This letter proposed a novel tunable reflection‐type phase shifter (RTPS) with a filtering function using substrate‐integrated suspended line (SISL) technology. First, a novel 3‐dB branch‐line coupler with a filtering function is designed by using broadside coupling lines. On this basis, the filtering RTPS is realized by combining with a series varactor network. The proposed SISL filtering RTPS can...

article

An SISL dual‐band filtering antenna with parasitic strips for 5G applications

Hetian Zhou, Ningning Yan, Kaixue Ma

International Journal of RF and Microwave Computer‐Aided Engineering > 32 > 10 > n/a - n/a

This paper proposes a dual‐band filtering patch antenna with out‐of‐band rejection for 5G applications. The design is based on the substrate integrated suspended line (SISL) platform, which combines a T‐junction power divider, a square driven patch with an I‐slot, and two parasitic strips, fed by slot coupling to achieve the desired performance. The working mechanism of dual‐band operation is explained...

article

A frequency reconfigurable high‐order mode monopole antenna with two independently controlled band

Yu Luo, Songjiang Zhao, Ningning Yan, Wenxing An, more

International Journal of RF and Microwave Computer‐Aided Engineering > 32 > 10 > n/a - n/a

A dual‐band printed monopole antenna with frequency‐independent reconfiguration is proposed. Two varactor diodes are placed at the zero point of the current distribution in the third‐ and fifth‐order modes of the traditional monopole radiator. By separately regulating the reverse bias voltage of the two varactor diodes, the corresponding two frequency bands can be controlled independently. A fully...

article

A 220‐GHz CMOS passive subharmonic downconverter for low‐IF applications

Haipeng Fu, Puhuan Huang, Kaixue Ma

Microwave and Optical Technology Letters > 64 > 10 > 1694 - 1699

This paper presents a 220‐GHz subharmonic downconverter with high conversion gain (CG) and low noise figure (NF) implemented in 28 nm bulk CMOS, including a core mixer and an intermediate frequency (IF) amplifier. Based on the traditional quasi‐subharmonic mixer, new gate‐shorted technology is presented to improve NF and CG by adding a source inductor to reduce the loss of radiofrequency signals....

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SUBSTRATE INTEGRATED SUSPENDED LINE (SISL) (27)
CMOS INTEGRATED CIRCUITS (25)
SUBSTRATES (23)
GAIN (21)
TRANSISTORS (19)
SWITCHES (18)
COUPLINGS (16)
INSERTION LOSS (16)
BAND-PASS FILTERS (15)
SIGE BICMOS (15)
60 GHZ (14)
BANDWIDTH (14)
INDUCTORS (14)
MICROSTRIP (14)
MILLIMETER-WAVE (13)
CMOS (12)
MICROWAVE FILTERS (12)
WIRELESS COMMUNICATION (12)
LOW POWER (11)
SWITCHING CIRCUITS (11)
VOLTAGE-CONTROLLED OSCILLATORS (11)
CAVITY RESONATORS (10)
PASSBAND (10)
PHASE NOISE (10)
RADIO FREQUENCY (10)
RESONATOR FILTERS (10)
BAND PASS FILTERS (9)
CMOS TECHNOLOGY (9)
RESONANT FREQUENCY (9)
TUNING (9)
CAPACITORS (8)
COPLANAR WAVEGUIDES (8)
COUPLERS (8)
DUAL BAND (8)
IMPEDANCE (8)
LOSS MEASUREMENT (8)
MICROSTRIP FILTERS (8)
BANDPASS FILTER (7)
LOW PHASE NOISE (7)
POWER AMPLIFIER (7)
POWER AMPLIFIERS (7)
POWER GENERATION (7)
SILICON (7)
WIDEBAND (7)
COILS (6)
LINEARITY (6)
LOW POWER DESIGN (6)
METALS (6)
RECEIVERS (6)
RFIC (6)
TRANSCEIVERS (6)
WIDE STOPBAND (6)
24 GHZ (5)
60GHZ (5)
ANTENNA MEASUREMENTS (5)
BASEBAND (5)
FILTERING THEORY (5)
FREQUENCY CONVERSION (5)
FREQUENCY SYNTHESIZERS (5)
HARMONIC ANALYSIS (5)
IMPEDANCE MATCHING (5)
INTEGRATED CIRCUIT MODELING (5)
MICROWAVE CIRCUITS (5)
MILLIMETER WAVE (5)
MIXER (5)
MIXERS (5)
POWER TRANSMISSION LINES (5)
SIGE (5)
SILICON GERMANIUM (5)
SUBSTRATE INTEGRATED SUSPENDED LINE (5)
TRANSMISSION LINE MEASUREMENTS (5)
V-BAND (5)
VCO (5)
ANTENNA (4)
ANTENNAS (4)
BAND-STOP FILTERS (4)
BANDPASS FILTER (BPF) (4)
BICMOS INTEGRATED CIRCUITS (4)
CAPACITANCE (4)
DUAL‐BAND (4)
EQUIVALENT CIRCUITS (4)
FILTER (4)
FREQUENCY (4)
FREQUENCY 60 GHZ (4)
FREQUENCY MODULATION (4)
FREQUENCY SYNTHESIZER (4)
GAIN CONTROL (4)
LOGIC GATES (4)
LOW COST (4)
NOISE FIGURE (4)
PHASE SHIFTERS (4)
POWER ADDED EFFICIENCY (PAE) (4)
POWER DEMAND (4)
Q-FACTOR (4)
RADIOFREQUENCY INTEGRATED CIRCUITS (4)
SPIRALS (4)
SYNTHESIZERS (4)
SYSTEM-ON-CHIP (4)
TOPOLOGY (4)
ULTRA WIDEBAND TECHNOLOGY (4)
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Search results for: Kaixue Ma

A high linearity 0.05–7 GHz digital step attenuator with the capacitive compensation for bonding wires parasitic parameters

Slow‐wave substrate integrated suspended parallel strip line and its application to rat‐race coupler

A negative‐resistance oscillator using dual‐cavity based on SISL technology

A 34.16–39.6 GHz low phase noise VCO for frequency‐modulated continuous‐wave radar in a 28‐nm CMOS

A wideband transition from substrate integrated suspended parallel strip line (SISPSL) to differential shielded GCPW

A compact low‐pass filter using a miniaturized capacitor and honeycomb cavity on substrate integrated suspended line platform

Synthesis design of quad‐band bandpass filter with mixed frequency transformation method

Design of a wide beamwidth spherical conformal antenna array for ship‐borne applications

An active‐passive cascaded bandpass filter with an 88 kHz–1.1 GHz bandwidth on substrate‐integrated suspended line platform

A 4.5–7.5 GHz highly integrated transceiver front‐end for UWB application

A novel self‐packaged DBBPF with multiple TZs for 5G sub‐6 GHz applications

Analysis and design of a 1.7‐ to 27.1‐GHz low‐noise amplifier

FR‐4‐based Ka‐band SISL bandpass filters using folded half‐wavelength resonators

A sequentially rotated feeding circularly polarized stacked patch antenna array based on SISL

A single‐layer high‐isolation multiple‐input‐multiple‐output antenna for millimeter wave applications

A circuit‐based neuro‐space mapping technique for small‐signal modeling of multi‐gate GaN HEMT switches

A tunable reflection‐type filtering phase shifter using SISL technology

An SISL dual‐band filtering antenna with parasitic strips for 5G applications

A frequency reconfigurable high‐order mode monopole antenna with two independently controlled band

A 220‐GHz CMOS passive subharmonic downconverter for low‐IF applications

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