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A Dual-Core Dual-Mode Class-F VCO With Wide Frequency Tuning Range Using Wide Inductance-Switching-Range Inductor 采用宽电感开关量程电感的双核双模宽频率调谐范围f类压控振荡器
IEEE microwave and wireless technology letters Pub Date : 2025-02-10 DOI: 10.1109/LMWT.2025.3536158
Yaru Hou;Runlong Li;Pei-Ling Chi;Tao Yang
{"title":"A Dual-Core Dual-Mode Class-F VCO With Wide Frequency Tuning Range Using Wide Inductance-Switching-Range Inductor","authors":"Yaru Hou;Runlong Li;Pei-Ling Chi;Tao Yang","doi":"10.1109/LMWT.2025.3536158","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3536158","url":null,"abstract":"A novel dual-core dual-mode class-F voltage-controlled oscillator (VCO) with wide frequency tuning range (TR) is proposed in this letter. It consists of two coupled parallel “8”-shaped inductor and two crossed-coupled VCO cores. To increase the TR of the proposed VCO without adding additional footprint size, a single-turn common-mode inductor is embedded inside the “8”-shaped inductor. By controlling the mode switches, the inductor can work in different modes with large inductance difference, realizing large VCO TR consequently. Then, the two coupled inductors were engineered to form the fundamental and third harmonic resonances, respectively, thereby producing a pseudo-square wave output waveform and realizing class-F operation. With the proposed configuration, the phase noise (PN) of the proposed VCO can be significantly reduced without increasing VCO core size. To demonstrate the proposed idea, a VCO prototype is fabricated in a 65-nm CMOS process with a core size of <inline-formula> <tex-math>$1.235times 0.8$ </tex-math></inline-formula> mm. It achieves a wide frequency TR from 2.84 to 7.04 GHz. The measured PN at 1-MHz offset is from −123.9 to −113.1 dBc/Hz, demonstrating an FOMT of 196.0–201.3 dBc/Hz.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 4","pages":"460-463"},"PeriodicalIF":0.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Improved Compressive Sensing-Based Model for Efficient Analysis of Monostatic Electromagnetic Scattering Problems 一种改进的基于压缩感知的单稳态电磁散射问题有效分析模型
IEEE microwave and wireless technology letters Pub Date : 2025-02-10 DOI: 10.1109/LMWT.2025.3537296
Qi Qi;Yunuo Fan;Xinyuan Cao;Yi Liu;Meng Kong;Zhixiang Huang;Xianliang Wu
{"title":"An Improved Compressive Sensing-Based Model for Efficient Analysis of Monostatic Electromagnetic Scattering Problems","authors":"Qi Qi;Yunuo Fan;Xinyuan Cao;Yi Liu;Meng Kong;Zhixiang Huang;Xianliang Wu","doi":"10.1109/LMWT.2025.3537296","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3537296","url":null,"abstract":"To further accelerate the analysis of monostatic electromagnetic (EM) scattering problems of objects, an improved compressive sensing (CS)-based model is proposed. First, an orthogonal subspace spanned by the wide-angle induced currents is identified by means of the wide-angle incident sources. Then, the sparse transform of the induced currents is replaced by the subspace projection. In addition, an optimal number of measurements is determined, only slightly larger than the dimension of the subspace. Finally, the recovery algorithm is simplified to the least-squares method to solve the resulting overdetermined system. Compared with the traditional CS-based model, the proposed model significantly improves the efficiency of the recovery step and optimizes both the requirement for and the way of determining the number of measurements.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 4","pages":"388-391"},"PeriodicalIF":0.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Balanced HTS Dual-Narrowband BPF Based on meta-HRRs With Highly Controllable Passbands 基于高可控通带元hrr的平衡HTS双窄带BPF
IEEE microwave and wireless technology letters Pub Date : 2025-02-10 DOI: 10.1109/LMWT.2025.3538161
Ruolin Wang;Haiwen Liu
{"title":"A Balanced HTS Dual-Narrowband BPF Based on meta-HRRs With Highly Controllable Passbands","authors":"Ruolin Wang;Haiwen Liu","doi":"10.1109/LMWT.2025.3538161","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3538161","url":null,"abstract":"In this letter, a miniaturized fourth-order balanced high-temperature superconducting (HTS) dual-narrowband filter using meta-hairpin ring resonators (meta-HRRs) is proposed. By virtue of the introduced quasi-lumped interdigital capacitors, inductive spiraled and meandering structures, a miniaturized size and multiple electric and magnetic (EM) transmission paths are generated. Thus, based on the features of sub wavelength size, highly controllable differential-mode (DM) dual mode, and EM coupling of meta-HRRs, a balanced dual-narrowband filter with attractive common-mode (CM) rejection and two controllable transmission zeros (TZs) is designed. For proof of concept, the experimental results of balanced circuit using HTS technology centering at 2.153 and 2.389 GHz are in good agreement with simulations, which validate the practicality of design concept.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 4","pages":"408-411"},"PeriodicalIF":0.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analog Predistortion Linearizer With Controllable Gain Expansion and Low AM/PM Conversion 具有可控增益扩展和低 AM/PM 转换功能的模拟预失真线性化器
IEEE microwave and wireless technology letters Pub Date : 2025-02-10 DOI: 10.1109/LMWT.2025.3533752
Pengyu Yu;Kwok-Keung Michael Cheng
{"title":"Analog Predistortion Linearizer With Controllable Gain Expansion and Low AM/PM Conversion","authors":"Pengyu Yu;Kwok-Keung Michael Cheng","doi":"10.1109/LMWT.2025.3533752","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3533752","url":null,"abstract":"This letter introduces a novel analog predistorter (APD) design by using Schottky diodes and simple transmission lines only. The proposed linearizer exhibits controllable gain expansion profile (by adjusting bias voltage) and reduced AM/PM distortion (by inserting compensation capacitor). It also features high return loss and negligible power consumption. For verification, both simulated and measured AM/AM and AM/PM behaviors of the proposed APD are shown. Furthermore, the linearization of a class-AB power amplifier (PA) is evaluated using a 10-MHz 64-QAM LTE signal with a peak-to-average power ratio (PAPR) of 6.6 dB. At 6.9-dB OBO, the measured adjacent channel power ratio (ACPR) is found to improve from −31.9 dBc (without APD) to −40.5 dBc (with APD).","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 4","pages":"472-475"},"PeriodicalIF":0.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 2.4–3.5 GHz Broadband Analog Predistorter With Independently Tunable Gain 具有独立可调增益的2.4-3.5 GHz宽带模拟预失真器
IEEE microwave and wireless technology letters Pub Date : 2025-02-10 DOI: 10.1109/LMWT.2025.3535953
Haiqian Tang;Songbai He;Peng Hao;Minxian Song;Fei You
{"title":"A 2.4–3.5 GHz Broadband Analog Predistorter With Independently Tunable Gain","authors":"Haiqian Tang;Songbai He;Peng Hao;Minxian Song;Fei You","doi":"10.1109/LMWT.2025.3535953","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3535953","url":null,"abstract":"This letter proposes a method for a broadband reflective analog predistorter (RAPD) with independently tunable gain. The predistorter is based on asymmetric loadings of a hybrid bridge. Constant-gain and constant-phase variation curves can be plotted in the Smith chart to analyze the amplitude-phase characteristics. Based on the constant-gain and constant-phase variation curves at different frequencies, a broadband RAPD can be designed. To validate the method, a predistorter was designed and fabricated at 2.4–3.5 GHz. The measurement results indicate that the AM-AM tuning range exceeds 2.1 dB across the entire frequency band, while the AM-PM is less than 2.8°. The predistorter was employed to linearize a broadband power amplifier. The experimental results demonstrate that under the excitation of a 20 MHz 64-QAM signal, the adjacent channel power ratio (ACPR) improves to below -45 dBc within the operating frequency.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 4","pages":"476-479"},"PeriodicalIF":0.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Fully Integrated GaAs MMIC Asymmetric Doherty Power Amplifier With Enhanced Gain Flatness 增益平坦度增强的全集成GaAs MMIC非对称多尔蒂功率放大器
IEEE microwave and wireless technology letters Pub Date : 2025-02-05 DOI: 10.1109/LMWT.2025.3535739
Xinran Yang;Yi Zhao;Lang Chen;Zeyu Ge;Jiani Zhou;Feng Sun
{"title":"A Fully Integrated GaAs MMIC Asymmetric Doherty Power Amplifier With Enhanced Gain Flatness","authors":"Xinran Yang;Yi Zhao;Lang Chen;Zeyu Ge;Jiani Zhou;Feng Sun","doi":"10.1109/LMWT.2025.3535739","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3535739","url":null,"abstract":"A novel fully integrated asymmetric Doherty power amplifier (DPA) with optimized driver is proposed. By adjusting the unequal power divider (UPD) and the bias conditions of two-stage carrier and peak power amplifiers (PPAs), good back-off efficiency (BOE) and gain flatness have been achieved. To validate the proposed concept, a 2.45-GHz asymmetric DPA (ADPA) is fabricated in 2-<inline-formula> <tex-math>$mu $ </tex-math></inline-formula>m gallium arsenide (GaAs) heterojunction bipolar transistor (HBT) process. Under continuous-wave (CW) measurement, the power amplifier (PA) can provide a saturated output power (<inline-formula> <tex-math>$P_{text {SAT}}$ </tex-math></inline-formula>) of 32.3 dBm with a power added efficiency (PAE) of 28% at 2.45 GHz. The measured PAE is higher than 21% at 7-dB power back-off (PBO) levels. Furthermore, under the excitation of 256-quadrature amplitude modulation (QAM) signal, the proposed ADPA achieves a PAE of 22% at an average output power (<inline-formula> <tex-math>$P_{text {avg}}$ </tex-math></inline-formula>) of 25.8 dBm with DPD while ensuring that the EVM is better than −32 dB.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 4","pages":"488-491"},"PeriodicalIF":0.0,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Small-Signal Model of GaN-on-Si HEMTs Based on Improved Imperialist Competitive Algorithm 基于改进的帝国主义竞争算法的硅基氮化镓 HEMT 小信号模型
IEEE microwave and wireless technology letters Pub Date : 2025-02-04 DOI: 10.1109/LMWT.2025.3535773
Kairan Bian;Weiyuan Wang;Xiao Ma;Tianjiao Li;Hong Wang
{"title":"Small-Signal Model of GaN-on-Si HEMTs Based on Improved Imperialist Competitive Algorithm","authors":"Kairan Bian;Weiyuan Wang;Xiao Ma;Tianjiao Li;Hong Wang","doi":"10.1109/LMWT.2025.3535773","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3535773","url":null,"abstract":"We propose an improved imperialist competitive algorithm (I-ICA)-based extraction method for small-signal model of GaN HEMT on Si. The proposed algorithm introduces differential evolution and boundary processing in the empire assimilation process, which effectively improves the search ability and search speed. The experimental results show that the improved imperialistic competition algorithm greatly improves the traditional optimization algorithm, which falls into local optimum. In the frequency range from 0.1 to 9 GHz, the simulation results agree well with the measurements under different operating conditions, indicating the reliability of the model.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 4","pages":"464-467"},"PeriodicalIF":0.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Self-Packaged Tunable LC Fourth-Order Filter With Cross-Coupling and Bandwidth Compensation 具有交叉耦合和带宽补偿的自封装可调谐LC四阶滤波器
IEEE microwave and wireless technology letters Pub Date : 2025-02-04 DOI: 10.1109/LMWT.2025.3535706
Longchuan Liu;Qianyin Xiang;Quanyuan Feng
{"title":"A Self-Packaged Tunable LC Fourth-Order Filter With Cross-Coupling and Bandwidth Compensation","authors":"Longchuan Liu;Qianyin Xiang;Quanyuan Feng","doi":"10.1109/LMWT.2025.3535706","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3535706","url":null,"abstract":"This letter presents a cross-coupled lumped LC tunable bandpass filter (BPF) based on novel LC electric coupling circuits and magnetic dominant mixed coupling circuits. The design enables control over the slope and magnitude of the electric and magnetic coupling coefficients to compensate the bandwidth. The magnetic dominant mixed coupling, serving as cross-coupling, generates a pair of adaptive transmission zeros (TZs) on either side of the passband and an additional mixed coupling TZ at low frequency. To validate this concept, two tunable LC filters—Filter I, based on low-cost FR4 substrate-integrated suspended line (SISL), and Filter II, based on low loss microwave substrate-integrated microstrip, are designed and fabricated. Both filters showcase a wide tuning range and compact size. The SISL filter is with a tuning range of 0.36–0.77 GHz and a size of <inline-formula> <tex-math>$0.09lambda _{mathbf {g}} times 0.04lambda _{mathbf {g}}$ </tex-math></inline-formula>, which stands out for its self-packaging capabilities and cost-effectiveness.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 4","pages":"420-423"},"PeriodicalIF":0.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An SIW-Based Wideband 5G mmWave Bandpass Filter by Using Multimode Resonator 基于多模谐振器的宽带5G毫米波带通滤波器
IEEE microwave and wireless technology letters Pub Date : 2025-02-04 DOI: 10.1109/LMWT.2025.3533482
Xiaohuai He;Dawei Ding;Xiu Yin Zhang
{"title":"An SIW-Based Wideband 5G mmWave Bandpass Filter by Using Multimode Resonator","authors":"Xiaohuai He;Dawei Ding;Xiu Yin Zhang","doi":"10.1109/LMWT.2025.3533482","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3533482","url":null,"abstract":"In this letter, a wideband bandpass filter (BPF) is proposed for the first time by embedding a multimode resonator (MMR) in one substrate integrated waveguide (SIW) cavity. This design has a wide bandwidth by combining the fundamental mode of SIW (i.e., TE110 mode) and the separated odd/even modes of MMR. A filter covering 22.24–31.74 GHz is obtained to behave low insertion loss, high selectivity, wide operating bandwidth, and high out-of-band suppression. The measured results show that this filter could provide a promising candidate for the fifth-generation (5G) millimeter-wave (mmWave) communication systems.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 4","pages":"412-415"},"PeriodicalIF":0.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization Design of Output Combining Network Using Irregular Structure for Broadband DPA 基于不规则结构的宽带DPA输出组合网络优化设计
IEEE microwave and wireless technology letters Pub Date : 2025-02-04 DOI: 10.1109/LMWT.2025.3534192
Heng Zhang;Jing Xia;Zhongpeng Ni;Xiaoshuai Ge;Wa Kong;Wence Zhang;Chao Yu;Xiao-Wei Zhu
{"title":"Optimization Design of Output Combining Network Using Irregular Structure for Broadband DPA","authors":"Heng Zhang;Jing Xia;Zhongpeng Ni;Xiaoshuai Ge;Wa Kong;Wence Zhang;Chao Yu;Xiao-Wei Zhu","doi":"10.1109/LMWT.2025.3534192","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3534192","url":null,"abstract":"This letter presents an optimization design method for broadband Doherty power amplifier (DPA) using an irregular output combining network (OCN). First, the postmatching network and the output matching networks are considered as the overall OCN, and the three-port S-parameters of the OCN are analyzed and calculated using the impedances at power back-off (PBO) and saturation. Subsequently, to improve the feasibility of optimization, several impedances that meet the requirements are used to calculate feasible S-parameter solution sets, which can be used as the optimization target. Finally, an optimization method of the OCN using an irregular structure is proposed. For verification, a 1.2–2.8-GHz broadband DPA is designed and measured. The results show that with the saturated output power exceeding 43.1 dBm, drain efficiencies of 54.1%–74.2% and 50.9%–56.5% are obtained at saturation and 6-dB PBO, respectively.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 4","pages":"480-483"},"PeriodicalIF":0.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143839865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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