Radiofrequency Microwave Research Articles

Assessment of Measurement Uncertainty for S-Parameter Measurement Based on Covariance Matrix.

S-parameters are widely used to detail the scattering parameters of radio frequency (RF) components and microwave circuit modules. The vector network analyzer (VNA) is the most commonly used device for measuring S-parameters. Given the multiple frequency points, complex values, and intricate uncertainty propagation involved, accurately assessing the uncertainty of S-parameter measurements is difficult. In this study, we proposed a new method for assessing S-parameter uncertainty based on the covariance matrices, tracing back to the nominal uncertainty of calibration standards. First, we analyzed the relevant theory of uncertainty assessment using covariance matrices and subsequently deduced the mechanism of Type B uncertainty propagating from calibration standards to error model coefficients and S-parameter measurements to evaluate Type B measurement uncertainty. In this study, a novel measurement system was constructed for measuring grounded coplanar waveguides by using a VNA and calibration standards with 8- and 12-error models. Initially, the model assessed the Type B uncertainty of measuring four S-parameters of a grounded coplanar waveguide. Next, the VNA calibrated with the 12-error model was used to conduct multiple repeated measurements to assess the Type A uncertainty of the grounded coplanar waveguide. Finally, the composite uncertainty was constructed, which demonstrated that the proposed method can be used for assessing the uncertainty of S-parameters.

A modified method for precise anastomosis during laparoscopic low anterior resection for rectal cancer: the first clinical experience and application

BackgroundThere is no criterion to guide and evaluate the anastomosis of laparoscopic low anterior resection (LAR). We developed a new technique for precise anastomosis. This study endeavored to evaluate the effectiveness and safety of this new technology.MethodsPatients with mid-low rectal cancer who underwent laparoscopic LAR in our department were enrolled retrospectively between January 1, 2021 and July 1, 2023. During the LAR, the distance between the sacral promontory and the rectal stump was measured and used to determine the length of the sigmoid colon, which was preserved for anastomose. The demographic characteristics and short-term outcomes were analyzed.ResultsForty-nine patients (26 men, 23 women) with low and middle rectal cancer were retrospectively enrolled in the study. The distance of the tumor from the anal verge was 6.4 ± 2.7 cm. The operative time was 193 ± 42 min. All patients underwent precise anastomosis, among which 12 patients underwent freeing of the splenic flexure of the colon. According to our criteria, there was no redundant or tense state of the colon anterior to the sacrum after the anastomosis. Only one patient had a postoperative anastomotic leak (Grade B). All 15 patients receiving neoadjuvant chemoradiotherapy underwent terminal ileostomy. No postoperative death occurred within 30 days of the surgery. The median follow-up time in our study was 12 months. One patient developed a single metastasis in the right lobe of the liver in the eighth month after surgery and underwent microwave radiofrequency ablation, which did not recur in the four months of postoperative follow-up, and the rest of the patients survived disease-free without recurrence of metastasis.ConclusionsPrecise measurement of the proximal colon of the anastomosis can ensure accurate and convenient colorectal anastomosis and this may be a technique worthy of clinical application. However, its effectiveness needs to be further verified in a multicenter clinical trial.

Gigahertz electromagnetic pulse emission from femtosecond relativistic laser-irradiated solid targets.

The interactions between high-intensity laser and matter produce particle flux and electromagnetic radiation over a wide energy range. The generation of extremely intense transient fields in the radio frequency-microwave regime has been observed in femtosecond-to-nanosecond laser pulses with 1011-1020-W/cm2 intensity on both conductive and dielectric targets. These fields typically cause saturation and damage to electronic equipment inside and near an experimental chamber; nevertheless, they can also be effectively used as diagnostic tools. Accordingly, the characterization of electromagnetic pulses (EMPs) is extremely important and currently a popular topic for present and future laser facilities intended for laser-matter interaction. The picosecond and sub-picosecond laser pulses are considerably shorter than the characteristic electron discharge time (∼0.1 ns) and can be efficient in generating GHz EMPs. The EMP characterization study of femtosecond laser-driven solid targets is currently mainly in the order of 100 mJ laser energy, in this study, the EMP generated by intense (Joule class) femtosecond laser irradiation of solid targets has been measured as a function of laser energy, laser pulse duration, focal spot size, and target materials. And a maximum electric field of the EMP reaching up to 105 V/m was measured. Analyses of experimental results confirm a direct correlation between measured EMP energy and laser parameters in the ultrashort pulse duration regime. The EMP signals generated by femtosecond laser irradiation of solid targets mainly originate from the return current inside the target after hot electron excitation. Numerical simulations of EMP are performed according to the target charging model, which agree well with the experimental results.

A Side-Effect-Free Interventional Therapy for Precisely Eliminating Unresectable Cancer Pain.

Of patients bearing unresectable tumors at advanced stages, most undergo serious pain. For unresectable tumors adjacent to vital organs or nerves, eliminating local cancer pain without adverse effects remains a formidable challenge. Interventional ablative therapies (IATs), such as radio frequency ablation (RFA), microwave ablation, and irreversible electroporation, have been clinically adopted to treat various carcinomas. In this study, we established another palliative interventional therapy to eliminate local cancer pain, instead of relieving nociception temporarily. Here, we developed another interventional ablative therapy (termed nanoparticle-mediated microknife ablation) to locoregionally eliminate cancer pain and tumors. The IAT system was composed of self-assembled nanodrugs, infusion catheters, puncture needles, injection pump, and an empirical tumor ablation formula. Notably, the ablation formula established in the IAT system enables us to predict the essential nanoparticle (NP) numbers used for completely destroying tumors. In a mouse model of cancer pain, tumor-targeted nanodrugs made of Paclitaxel and Hematoporphyrin, which have an extremely high drug-loading efficiency (more than 60%), were infused into tumors through injection pumps under imaging guidance. In conclusion, when compared to classic chemotherapeutic agents, IAT showed significantly higher effectiveness in cancer pain removal. It also presented no damage to the nervous, sensory, and motor capabilities of the treated mice. All of these merits resulted from NPs' long-lasting retention, targeted ablation, and confined diffusion in tumor stroma. Therefore, this safe treatment modality has great potential to eradicate local cancer pain in the clinic.

A Comparative Study of Antitumor Immunity Induced by Radiofrequency Microwave and Cryoablation in Hepatocellular Carcinoma.

This study aimed to compare the immune responses induced by microwave ablation (MWA), radiofrequency ablation (RFA), and cryoablation (CRYO) in hepatocellular carcinoma (HCC) and identify differences in immune responses and the timing of immune changes. A bilateral subcutaneous model was established in C57 mice, and the successfully modeled mice were divided into the microwave (n = 15), radiofrequency (n = 15), CRYO (n = 15), control (n = 9), and blank groups (n = 3). Mice in the control group were dissected before ablation, whereas mice in the three ablation groups underwent ultrasound-guided ablation of one axillary tumor. Three mice were sacrificed and dissected at 1-4 weeks after ablation. After tissue processing, flow cytometry was used to detect the levels of CD8 + T and regulatory T (Treg) cells in the tissue, and western blotting was used to assess the level of programmed cell death ligand 1 (PD-L1) protein in the tumor tissue. The pattern of immune changes after the three types of ablation was consistent, with immune changes occurring at 3-4 weeks. CRYO induced the most significant increase in the percentage of CD8 + T cells. There were no significant differences in the levels of Treg cells and the level of PD-L1 protein among the three types of ablation (p > 0.05), but the decline in Treg cells and PD-L1 protein level caused by CRYO was the most pronounced. In the HCC mouse model, the immune changes following the three types of ablation were consistent, with immune changes occurring at 3-4 weeks. Among them, CRYO elicited the strongest adaptive immune response, and RFA outperformed MWA.

The Structure Design of a Microstrip Tunable Attenuator Based on Few-Layer Graphene

There are innovative applications for graphene materials in microwave Radio Frequency (RF) due to their unique optoelectronic properties. In this paper, a series of existing tunable microstrip attenuators based on few-layer graphene are compared and studied, and a new microstrip tunable attenuator based on few-layer graphene is proposed on this basis. Firstly, the relationship between the performance of different pair spacing attenuators with 4 pairs of graphene structures is analyzed based on the existing pair spacing studies with 1-3 pairs of structures; after that, the performance characteristics of the existing 1-4 pairs of graphene structures on different substrates are tested and analyzed; finally, a new tunable attenuator structure is proposed based on the above research results. The new attenuator consists of four parts, including a dielectric substrate, a microstrip line, a total of five pairs of graphene flakes on both sides and corresponding metal vias. The resistivity of the graphene flake can be changed by changing the access bias voltage, thus regulating the insertion loss of the attenuator. The experimental results show that the proposed attenuator can operate in the frequency range from 3 GHz to 10 GHz, and the insertion loss can be adjusted from -2 dB to -63 dB, with a high tunable performance of 61 dB.

Design and analysis of cooling jacket developed for vacuum power tubes by multiphase cooling

The vacuum tubes are used extensively in electronic industries. The MW level of vacuum tube are used in RF amplifiers and microwave sources in different sectors like defence, nuclear energy, satellites and medical diagnostics. The first step in the indigenous development of MW level of vacuum tube is the design of its cooling jacket. The cooling jacket of vacuum tubes use hypervapotron (HV) fins which are known for providing efficient cooling in compact space. The key objectives of this paper are to finalize the jacket’s construction material, evaluate the cooling jacket’s heat transfer performance at the MW level of RF (radiofrequency) power, and forecast safe operating conditions for given conditions of high heat flux and water flow rates. In this design, the vacuum tubes’ external dimensions are taken into consideration when designing the cooling jacket. ETP copper (Electrolytic Tough Pitch copper) and copper-chromium-zirconium (CuCrZr) are likely materials for the jacket’s construction. For the aforementioned design of the cooling jacket, FEA (Finite Element Analysis) simulations using a steady-state thermal module and computational fluid dynamics (CFD) simulations using an ANSYS CFX module are described for flow rates of 15, 30, and 60 lpm (liters per minute) and the heat flux 1, 2, 4, and 6 MW m−2. The results of CFD and FEA simulations are found to be in close agreement. A small deviation in results is seen after the start of nucleate boiling. 30 and 60 lpm are desirable flow rates for high heat flux values greater than 2 MW m−2. CuCrZr is the ideal material for a cooling jacket’s construction as it has safe working temperature limit of 350 °C at high heat flux values. Also, 15 lpm flow rate should be avoided while using this cooling jacket at heat flux values greater than or equal to 6 MW m−2.

Characteristics, application and development trend of the third-generation semiconductor

Various devices made of the third-generation semiconductor have been gradually applied to various fields with the rapid development of the third-generation semiconductor materials equipment, manufacturing technology, and device physics represented by SiC and GaN. Firstly, the characteristics of the third-generation semiconductors is analyzed in this paper. Compared with the first-generation and second-generation semiconductors, the third-generation semiconductor has a wider band gap width, higher breakdown electric field, higher thermal conductivity, higher electron saturation rate and more expensive price. Then this paper will talk about the application of the third-generation semiconductor. The third-generation semiconductor materials can be mainly used in three fields, which are photoelectric, microwave radio frequency and power electronics. In terms of the photoelectric aspect, this paper takes the blue LED as an example. The blue LED is produced because of the wide band gap of the third-generation semiconductor. In the microwave RF aspect, the paper takes the 5G communication system as an example. Third-generation semiconductors make the high-frequency, high-power devices needed for 5G communications systems. In the power electronics aspect, the paper cites new energy vehicles as an example. Third-generation semiconductor components have a number of features needed for new-energy vehicles. For example, third-generation semiconductors can work at high temperatures. Finally, this paper will introduce the development trend of it. In the future, larger wafers will become mainstream. The third-generation semiconductors will be used in more fields. In addition, the new material systems will gradually mature.

Advancements in Food Processing Technologies: Enhancing Safety, Quality, and Sustainability

Food processing technologies play a vital role in ensuring the safety, quality, and sustainability of the global food supply. This research investigates recent advancements in these technologies and their impact on food safety, product quality, and sustainability. Preservation techniques such as high-pressure processing, pulsed electric field processing, and hurdle technology are shown to enhance microbial safety while preserving nutrition and sensory attributes. Advanced thermal methods like microwave processing, ohmic heating, and radio frequency heating reduce processing time, energy consumption, and maintain product quality. Non-thermal technologies such as ultraviolet light, cold plasma, and ultrasound extend shelf life without compromising nutrition and sensory properties. Innovative packaging systems contribute to freshness, prolonged shelf life, and reduced food waste. The research emphasizes sustainable practices such as energy-efficient equipment, optimized water usage, waste reduction, and eco-friendly packaging materials. Adoption of advancements in food processing technologies can improve consumer confidence, reduce waste, and create a sustainable food supply chain. This research serves as a valuable resource for industry professionals, researchers, and policymakers seeking to implement innovative food processing technologies. Key Words: cutting-edge technologies, hurdle technology, ohmic heating, cold plasma technology

Giant Anisotropy of Charge-to-Spin Conversion in Fe Films with Fourfold-Symmetric Anisotropy

Manipulating charge-to-spin conversion in a single magnetic layer holds great promise for optimizing efficiency of spintronic devices. Here we present experimental evidence uncovering a giant conversion anisotropy of up to 400% in fourfold-symmetric anisotropy $\mathrm{Fe}$ films on $\mathrm{Mg}\mathrm{O}(100)$ substrate by changing the direction of applied radio frequency microwave currents from the magnetic hard axis to the easy one. Together with the anisotropy of Gilbert damping and anisotropic magnetoresistance, the fourfold-symmetric anisotropy is found to stem from large emergent spin-orbit coupling in $\mathrm{Fe}$ films with local lattice distortions, which is further confirmed by selected area electron diffraction patterns in different regions. Given that $\mathrm{Fe}$ films are deposited by magnetron sputtering at room temperature, our results suggest a simple route for designing future energy-efficient magnetic devices for mass production.

Improvement of the magnon-magnon coupling strength in Y3Fe5O12/Py heterostructures

Magnon-quasiparticle couplings perform magnon information transferences and transports, thus controlling the coupling strengths is significant for novel information function devices. Here, we report the modulation of the magnon-magnon (M−M) coupling strength in Y3Fe5O12/permalloy (YIG/Py) heterostructures via ferromagnetic resonance (FMR) technique. The anti-crossing gap gc enhances 80 Hz by changing the radio frequency (rf) microwave power, which could be ascribed to the enhancement of the dipolar interaction and spin pumping effect. Furthermore, the gc decreases with the increasing angle θ between external magnetic field and rf current due to the increase of magnon relaxation. Moreover, the FMR linewidths change with increasing angle θ due to the magnetic anisotropy parameters and the two-magnon relaxation mechanism induced by the more oblique external field.

Si3 N4 Passivation and Side Illumination of High-Power Photoconductive Semiconductor Switch Based on Free-Standing SI-GaN

To meet the needs of wide band gap (WBG) gallium nitride (GaN)-based photoconductive semiconductor switch (PCSS) in high-voltage and high-power microwave systems. Herein, silicon nitride (Si3N4) dielectric films were deposited on GaN PCSS using plasma-enhanced chemical vapor deposition (PECVD) and illuminated from the side of the device. A high refractive index of 2.03 and a high permittivity of 7.97 were obtained from Si3N4 films, which are characterized by high optical and dielectric properties. According to the electrostatic field simulation, Si3N4’s high permittivity minimizes the peak electric field at the electrode boundary of GaN PCSSs. When the 532-nm incident light is side illuminated for the device, the output peak power and rise time are 59.8 kW and 0.52 ns, respectively. At a future date, the proposed GaN-based PCSS will have a practical application for radio frequency microwave systems.

The Initial Test of a Micro-Joules Trigger, Picosecond Response, Vertical GaN PCSS

To meet the miniaturization of all-solid-state high-power microwave drive technology based on photoconductive semiconductor switches (PCSSs), a vertical gallium nitride (GaN) PCSS that is triggered by a micro-joules energy and picoseconds pulse width laser is presented. The device has showed low triggering optical energy and fast response. When the bias-voltage is 3 kV and optical energy is 33 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu \text{J}$ </tex-math></inline-formula> , the photocurrent, on-state resistance, rise-fall time and quantum efficiency of the PCSS are 4.28 A, <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$650.5~\Omega $ </tex-math></inline-formula> , 412/370 ps and 0.28%, respectively. It is anticipated that GaN-based PCSS will have a practical application in future radio frequency (RF) microwave systems for military purposes.

Failure Mechanism of pHEMT in Navigation LNA under UWB EMP.

With the development of microelectronic technology, the integration of electronic systems is increasing continuously. Electronic systems are becoming more and more sensitive to external electromagnetic environments. Therefore, to improve the robustness of radio frequency (RF) microwave circuits, it is crucial to study the reliability of semiconductor devices. In this paper, the temporary failure mechanism of a gallium arsenide (GaAs) pseudomorphic high electron mobility transistor (pHEMT) in a navigation low-noise amplifier (LNA) under the jamming of ultra-wideband (UWB) electromagnetic pulses (EMP) is investigated. The failure process and failure mechanism of pHEMT under UWB EMP are elaborated by analyzing the internal electric field, current density, and temperature distribution. In detail, as the amplitude of UWB EMP increases, the output current, carrier mobility, and transconductance of pHEMT decrease, eventually resulting in gain compression. The injection experiment on LNA, which effectively verified the failure mechanism, indicates that the gain of pHEMT is suppressed instantaneously under the jamming of UWB EMP and the navigation signal cannot be effectively amplified. When UWB EMP amplitude increases to nearly 10 V, the BeiDou Navigation Satellite System (BDS) carrier signal is suppressed by nearly 600 ns. Experimental results accord well with the simulation of our model. UWB EMP jamming is a new and efficient type of electromagnetic attack system based on the device saturation effect. The performance degradation and failure mechanism analysis contribute to RF reinforcement design.

Application of hybrid laser powder bed fusion additive manufacturing to microwave radio frequency quarter wave cavity resonators

Application of hybrid laser powder bed fusion additive manufacturing to microwave radio frequency quarter wave cavity resonators

Effects of magnetic nanoscale combined radio frequency or microwave thawing on conformation of sea bass myosin heavy chain: a molecular dynamics study.

The consumption of frozen foods inevitably involves a thawing process. Protein conformation changes during a short thawing process and the quantification of their effects remains challenging. Molecular dynamics simulations can be used to evaluate the conformational changes of protein occurring in food processing. In the present study, four different thawing methods were used [i.e. magnetic nanometer combined with microwave thawing (MT-Mag), magnetic nanometer combined with radio frequency thawing (RT-Mag), radio frequency thawing (RT) and microwave thawing (MT)] to change the conformation of myosin heavy chain (MHC). The results obtained showed that, compared with the fresh sample, the hydrogen bond number and radius of gyration of the RT-Mag and RT groups were less decreased. Visual molecular dynamics STRIDE analysis showed that the content of the α helix was relatively high in the RT-Mag and MT-Mag groups. These simulation results indicate that RT-Mag can be used as an effective method for promoting the thawing process of fish and better stabilizing the protein structure. These conclusions provide a theoretical realization for understanding the protein conformational transition during the thawing process and the realization of quantification and also provide guidance for choosing better thawing conditions without loss of nutritional properties. © 2022 Society of Chemical Industry.

Design of smart seed sensor based on microwave detection method and signal calculation model

Most of the sensors currently used for seeding monitoring are photoelectric sensors. They are susceptible to dust and light, and they do not accurately identify double overlapping seeds. The monitoring accuracy still needs to be improved. This study designed a smart seed sensor based on the microwave detection method and signal calculation model to improve the resistance to dust and the monitoring accuracy of double overlapping seeds. The smart seed sensor used the microwave radio frequency front end as the signal source to generate 24 GHz electromagnetic wave signals. The relative movement between the sensor and the seed would produce a weak IF (Intermediate Frequency) signal. After amplifying and filtering the IF signal, the sensor generated an original pulse signal. Different from traditional sensors, this smart seed sensor added a computational recognition part: the original pulse signal would be acquired by the voltage acquisition module and the generated voltage signal would be recorded, the number of seeds could be determined according to the voltage signal calculation model, and then, the corresponding seed signal was output. The seed signal was finally acquired by the seeding monitoring system, and the target parameters were calculated. The smart seed sensor designed in this study is compared with the traditional photoelectric sensor and the high frequency radio wave type WaveVision seed sensor. The test results showed that the monitoring accuracy of the smart seed sensor for single seeds reached more than 99%, and the recognition accuracy for double overlapping seeds reached 56.3%. However, the recognition accuracy of the photoelectric sensor and the WaveVision seed sensor for double overlapping seeds was almost 0. Moreover, the performance of the smart seed sensor in terms of resistance to dust is better than that of the photoelectric sensor. The smart seed sensor has better comprehensive performance. This study has a positive effect on the further development of seeding monitoring technology.

Evaluation of disorders of adaptive mechanisms in heart failure by microwave dielectrometry

Differential diagnosis of stress adaptive mechanisms is one of the areas of modern biomedical engineering and the most complex part of the pre-nosological diagnosis of cardiac pathology. One of the manifestations of disadaptation in heart failure is a violation of the mechanisms of realization of the intracellular chain "signal-function". The concept of imbalance in the functioning of the adenylate cyclase system and β-adrenergic receptors of the erythrocytes membrane and cardiomyocytes is considered in the pathogenesis of the heart.&#x0D; The study of the dielectric constant (ε՜) of erythrocytes of patients with heart failure was performed using an instrument-recording complex based on microwave dielectrometry of the γ-dispersion region of free water dielectric permittivity. Testing of the β-adrenergic complex of the erythrocyte membrane by specific stimulators, blockers, and modulators was implemented at a fixed frequency of microwave radiofrequency generation (f = 37,7 GHz). Interpretation of the obtained experimental data was that the process of interaction of bioregulators with the biological system is accompanied by an increase or decrease in the relative amount of free water, which leads to a change in the real part of ε՜ complex dielectric constant. This allowed us to visualize the violation of the signal cell system at the molecular level, which manifested itself in the change of integral hydration by ε՜ parameter. It was shown that the change in the dielectric constant of the erythrocyte suspension at risk (patients with hereditary predisposition to dilated and ischemic cardiomyopathy) was significant relative to the dielectric parameters of erythrocyte samples from healthy donors; there was a tendency to block β-adrenergic receptors, with the combined action of adrenaline, PGE2 and cordanum, with Δε՜ = 0,009 ± 0,008 х 10-12 F/m. It should be noted the formation of preconditions for changes in the functioning of the adenylate cyclase system and the development of heart failure in the group at risk, is accompanied by dilated and ischemic cardiomyopathy.&#x0D; The effectiveness of the microwave dielectrometry method for the assessment of violations of adaptation mechanisms through the adenylate cyclase system of the erythrocyte membrane in dilated and ischemic forms of cardiomyopathies is shown. The results of the study are the basis for the introduction of the dielectric constant criterion in the general algorithm of pre-nosological diagnosis of heart failure.

Flavor characteristics of peanut butter pretreated by radio frequency heating, explosion puffing, microwave, and oven heating

Currently, the effect of different pretreatments (i.e., radio frequency (RF), explosion puffing (EP), microwave (MW) and oven heating (OH)) on the flavor characteristics of peanut butter is unclear. Consequently, this study identified volatile aroma and non-volatile taste using HS-SPME/GC–MS combined with the use of an electronic nose, electronic tongue, and sniffing. 53 volatile compounds in four peanut butters were identified, MW-treated samples exhibited the most aroma-active compounds (43), followed by samples treated using OH (42), EP (38) and RF (21). Different pretreatment resulted in significant flavor differences in the aroma and taste. The peanut butter under MW pretreatment had a strongest nutty notes among the treatments. RF methods yielded smaller particle sizes and better texture compared to conventional OH. However, instantaneous heating using EP did not result in improvements to the aroma or taste. A combination of MW and RF may improve the flavor quality of peanut butter.

Impact of tunnel gate process variations on analog/radio frequency (microwave) and small signal parameters of hetero‐material tunneling interfaced charge plasma junctionless tunnel field effect transistor

AbstractThis paper proposes a dual metal gate, hetero‐material tunneling interfaced junctionless tunnel field effect transistor (TFET), (DMG‐HJLTFET), utilizing III–V compound semiconducting materials, InAs (low band‐gap source material)/GaAs (higher band‐gap channel and drain material) by applying the band‐gap and dual material gate engineering. The 2‐D TCAD simulations have been executed to explore the impact of tunnel gate process variations—work function and length on DC and analog figure of merits (FOMs) of DMG‐HJLTFET. The extracted result parameters have also been compared to SMG (single metal gate)‐HJLTFET and conventional Si‐JLTFET. The DMG‐HJLTFET attains improved ON current in the range of 88.5 × 10−6 A/μm and OFF current remains as low as 2.89 × 10−16 A/μm. It exhibits a high current switching ratio of 3.1 × 1011 as compared to SMG‐HJLTFET (ION = 24 × 10−6 A/μm and ION/IOFF = 1.4 × 1011) and Si‐JLTFET (ION = 7 × 10−6 A/μm and ION/IOFF = 1.8 × 106). Further, the radio frequency/microwave (RF) parameters such as power gains (h12, UPG, and Gma), fmax, and GBP have been compared for all three aforementioned devices. Moreover, the small signal admittance (Y) parameters have been examined to explore the possible scope of DMG‐HJLTFET for future internet of everything communications and fast switching applications.