A gallium arsenide (GaAs)-based millimeter-wave broadband bandpass filter (BPF) is proposed based on slotted half-mode substrate integrated waveguide (HMSIW) spoof surface plasmon polaritons (SSPPs). The center frequency and bandwidth of this SSPP-based on-chip BPF can be easily controlled by tuning the geometry dimensions SSPP unit cell, which attributed to its unique dispersion characteristics. For demonstration, a prototype fabricated experimentally characterized, with good agreement...

In this letter, a <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">D</i> -band frequency octupler ( <inline-formula xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\times$</tex-math> </inline-formula> 8) with high harmonic suppression is presented in 0.13- notation="LaTeX">$\mu$</tex-math> m SiGe BiCMOS technology. To enhance the of even harmonics among harmonics, we have implemented and refined waveform shaping...

Abstract In this paper, on–off switching digitization of a W-band variable gain power amplifier (VGPA) with above 60 dB dynamic range is introduced for large-scale phased array. Digitization techniques modified stacking transistors partition are proposed to optimize configuration control sub-cells. By the techniques, radio frequency (VGA) could be highly customized both coarse and fine requirements instead using additional digital-to-analog converters tune overall bias. The designed VGA in...

Verbasoside and hydroxysalidroside are derivatives of phenylethanol glycosides (PhGs) that exhibit a range pharmacological activities also serve as valuable precursors for synthesizing other more complex PhGs. However, chemical synthesis plant extraction large-scale production impractical to date. Here, 79 fungi from four types PhG-containing plants their rhizospheric soils were screened out, endophyte Alternaria botrytis RYF1 Rehmannia glutinosa was identified with the ability generate...

In this letter, an on-chip bandpass filter (BPF) with ultrawide-stopband and high selectivity is designed manufactured by 2-μm gallium arsenide (GaAs) HBT technology. For the sake of rejection BPF, extra pair transmission zeros (TZs) locating at both sides passband produced introducing source-load coupling. Moreover, to improve a Pi-section circuit so that TZ obtained upper sidebands. The measurement results show bandwidth covers 2.4-4.3 GHz, while its insertion loss 2.05 dB 3.35 GHz....

This study presents a design of 94-GHz high-performance and highly compact frequency-modulated continuous-wave radar sensor. In this sensor, an <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$X$ </tex-math></inline-formula> -band CMOS-based all-digital phase-locked loop chip, notation="LaTeX">$W$ SiGe-based transceiver monolithic microwave integrated circuit (MMIC), GaN-based MMIC power amplifier (PA) are...

A novel synthesis method for lumped-element bandpass filters is proposed on the basis of frequency-dependent coupling matrices, which can preserve moderate bandwidth response matching with matrix prototype better. The available element values resonators and inverters acceptable quality factor are determined by adjusting normalized slope parameters or reference susceptance parameters. To validate design approach, two third-order inline fractional 20% at a center frequency 3 GHz designed...

In this letter, a quintuple‐mode bandpass filter for UWB system with improved performance is presented. The presented implemented asymmetric parallel‐coupled lines loaded open stub and short connected at the symmetrical plane of to increase its frequency selectivity. Five resonant frequencies within band two transmission zeros lower upper passband/stopband edges are observed. A prototype fabricated verification experimental data corresponding well simulated results. proposed achieves...

22(R)-hydroxycholesterol (22(R)-HCHO) is a crucial precursor of steroids biosynthesis with various biological functions. However, the production 22(R)-HCHO expensive and unsustainable due to chemical synthesis extraction from plants or animals. This study aimed construct microbial cell factory efficiently produce through systems metabolic engineering. First, we tested 7-dehydrocholesterol reductase (Dhcr7s) cholesterol C22-hydroxylases different sources in Saccharomyces cerevisiae, titer...

In this article, a compact ultra-wideband (UWB) bandpass filter (BPF) with sharp selectivity using interdigital coupled-line is proposed. Its input signal propagates through two different paths. The main transmission path consists of line structures, and the other microstrip loaded by short-circuited stubs. Comparing some UWB filters based on coupling three lines, proposed significantly improved due to zeros located at lower upper edge passband separately. Moreover, its are analyzed ABCD...

A novel miniaturised dual‐band bandpass filter (BPF) based on defected split‐ring resonators (SRRs) and irregular stepped‐impedance (SIRs) is proposed. By applying SRRs embedded with eight combinations of three whole or broken grooves, which are formerly used for divination, the passband 2.35–2.52 GHz wideband harmonic suppression achieved WLAN applications. To create one more 5.09–5.3 GHz, SIRs etched inside SRRs. Finally, such a prototype designed fabricated dimension only 20 × mm 2 (0.27...

In this letter, a compact multifunctional 180° hybrid suitable for sub-harmonic I/Q mixers is proposed. To feed LO and RF signals at different frequencies distribute DC supply, the combines an out-of-phase dual balun, two in-phase power dividers based on T-junction coupled lines, four zero-ohm transmission lines (ZTL) into single passive component. Chip size, insertion loss, bandwidth can all be improved by reducing number of components cascaded in circuit. The proposed hybrid's footprint...

MA0.6FA0.4PbI3 material based efficient and stable perovskite solar cells (PSCs) are fabricated by electron transport layer (ETL) interfacial modification. The highest power conversion efficiency (PCE) of device was ~ 17%. Cesium acetate cesium carbonate were used with low temperature processed sol-gel ZnO ETL for interface modifications. Low leakage current enhanced dark injection observed from current-voltage measurement. From the electrochemical impedance spectroscopy (EIS) measurement...

In this letter, a 75.1-151.4-GHz silicon power amplifier (PA) is devised with the help of sandwiched slab transformer, which proposed to increase tuning ranges coupling coefficient, quality factor, and conductivity. Being compact in size simple implementation enables it be well-applied multiple-way combination. Based on device, fabricated PA 130-nm germanium (SiGe) process demonstrates more than 14.1-dB gain at full W-band 77% D-band. From 75 117.7 GHz, its measured P <sub...

In this article, a highly integrated S-band prototype multifunction chip (MFC) featuring high integration level, bidirectional operation, reduced number of pads, and optimized power consumption is demonstrated with GaAs 0.15-μm pHEMT technology. order to pursue the MFC utilizes four amplifiers, two mixers, compact passive filters. For sake supply self-biasing technique adopted onchip power-combining technique. As for minimization, when system voltage constant, current reuse selected...

In this paper, high isolation K/Ka band monolithic microwave integrated circuit (MMIC) single pole double throw (SPDT) switches with different topologies are proposed and discussed. By using a 0.07 μm GaAs electron mobility transistor (HEMT) process, the shunt type series-shunt of passive HEMT SPDT designed compared. 24~27GHz, both demonstrate an better than 39dB. The switch demonstrates insertion loss less 1.5dB 2dB. With compact chip size smaller 1.5*2 mm <sup...

Optical fiber temperature sensors have been widely employed in enormous areas ranging from electric power industry, medical treatment, ocean dynamics to aerospace. Recently, graphene optical attract tremendous attention for their merits of simple structure and direct detecting ability. However, these based on transfer techniques still limitations the relatively low sensitivity or distortion transmission characteristics, due unsuitable Fermi level destruction structure, respectively. Here, we...

This paper presents a Ka-band doubly balanced ring mixer implemented by 0.13-μm GaAs mHEMT MMIC process. In this design, modified Marchand baluns are employed to improve balun's balance performance, achieve good port matching and simplify intermediate frequency (IF) extraction. Measured results show agreement with the simulations for both upand down-converter applications. The exhibits 6.3-10 dB conversion loss greatly improved return of LO/RF/IF port. LO-to-RF, LO-to-IF RF-to-IF isolations...

In this letter, an improved balanced Colpitts voltage-controlled oscillator (VCO) with a collector-emitter cross-coupled capacitors is presented. The proposed structure can introduce more robust oscillation startup condition. noise-shifting technique used to enhance the loaded quality factor of tank, which improves phase noise in turn. addition, three-bit switches composed enhancement-mode high-electron mobility transistors (E-HEMTs) are utilized expand tuning range and reconfigurability...