scholarly journals Multiple-beam and double-mode staggered double vane travelling wave tube with ultra-wide band

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Zheng Zhang ◽  
Cunjun Ruan ◽  
Ayesha Kosar Fahad ◽  
Chenyu Zhang ◽  
Yiyang Su ◽  
...  
Keyword(s):  
Output Power ◽  
Wave Structure ◽  
Wide Band ◽  
Cold Test ◽  
Travelling Wave ◽  
Numerical Control ◽  
Ultra Wideband ◽  
Ultra Wide Band ◽  
Wave Tube ◽  
Multiple Beam

AbstractThis paper presents design, fabrication and cold test of an ultra-wide band travelling wave tube (TWT) with planar alignment multiple pencil beams. The fundamental double-mode of staggered double vane slow wave structure (SDV-SWS) rather than the only one mode are put forward and adopted to match with the same electron beam to increase the bandwidth greatly. Simultaneous planar alignment multiple pencil beam tunnels are designed to improve interaction impedance and then to enhance output power, gain, efficiency, growth rate. The transmission performance of a two-stage 51-period SDV-TWT in G-band with structure attenuator between two sections shows that it indeed has an ultra-wideband performance from 81 to 110 GHz. By using computer numerical control machining, the SDV-SWS was manufactured and a detailed cold test was conducted. Good agreement is found at the wide band, where S21 is above − 5 dB and S11 is below − 10 dB. 3D PIC simulations with double-mode multiple-beam SDV-TWT within total length of 70 mm show that it can get a nearly 2120 W peak output power, a 42.5 dB corresponding gain and a 10.7% electron efficiency at 94 GHz with a 22.1 kV beam voltage and a 3 × 0.15A beam current. The 3 dB bandwidth of our double-mode SDV-TWT can achieve about 29 GHz.

scholarly journals Efficient Design of Micro Strip Patch Antenna for the Ultra Wideband (UWB) Applications

2020 ◽  
Vol 8 (5) ◽  
pp. 4517-4520
Keyword(s):  
Patch Antenna ◽  
Wide Band ◽  
Ultra Wideband ◽  
Ultra Wide Band ◽  
Strip Line ◽  
Efficient Design ◽  
Uwb Antennas ◽  
Feeding Technique ◽  
Wide Range ◽  
Uwb Applications

In this research paper a design of Microstip patch antenna for the ultra-wide band (UWB) applications is presented. Ultra wide band antennas has very wide band of operation which accommodates many communication frequencies as set by the federal commission of communication. The UWB antennas is based on the micro strip patch antenna concept and the design of the antenna is based on the stack antenna or multi-layer antenna. Stacking is used in designing for increasing the bandwidth of the antenna so stacking concept is good for the designing of the UWB antenna. The feeding used to feed the antenna is micro strip line feed. Micro strip line feeding technique is one of very popular feeding technique to feed the antenna because its fabrication is very simple. The proposed design is simulated in the CADFEKO software which is very useful for the design and analysis of a wide range of electromagnetic problem. It has many applications to simulate 3D electromagnetic circuit included antenna design, micro strip antenna and circuits. The simulation results shows the antenna bandwidth of 13.9 GHz from 2.6 to 16.5 GHz. So we can clearly say that the antenna is ultra-wide band in nature.

scholarly journals Dual Band Notch, Compact, Low profile, Hybrid Ultra Wideband RDRA

2020 ◽  
Vol 10 (1) ◽  
pp. 166-169
Keyword(s):  
Radiation Pattern ◽  
Dielectric Resonator ◽  
Surface Current ◽  
Wide Band ◽  
Ultra Wideband ◽  
Dual Band ◽  
Ultra Wide Band ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Ground Structure

This paper presents a novel, compact Ultra Wide Band , Asymmetric Ring Rectangular Dielectric Resonator Antenna (ARRDRA), which is a unique combination of Thin Dielectric Resonator (DR), Fork shape patch and defective ground structure. The base of the proposed antenna is its Hybrid structure, which generates fundamental TM, TE and higher order modes that yields an impedance bandwidth of 119%. Proposed antenna provides a frequency range from 4.2 to 16.6 GHz with a stable radiation pattern and low cross polarization levels. Peak gain of 5.5 dB and average efficiency of 90% is obtained by the design. Antenna is elongated on a FR4 substrate of dimension 20 x 24x 2.168 mm3 and is particularly suitable for C band INSAT, Radio Altimeter, WLAN, Wi-Fi for high frequencies. Ease in fabrication due to simplicity, compactness, stable radiation pattern throughout the entire bandwidth are the key features of the presented design. Inclusion of Defective ground structure and asymmetric ring not only increases the bandwidth but also stabilize the gain and efficiency due to less surface current. Presented design launch an Ultra Wide Band antenna with sufficient band rejection at 4.48-5.34 and 5.64-8.33 GHz with stable radiation pattern and high gain.

$W$ -Band Multiple Beam Staggered Double-Vane Traveling Wave Tube With Broad Band and High Output Power

2015 ◽  
Vol 43 (7) ◽  
pp. 2132-2139 ◽  
Author(s):  
Cunjun Ruan ◽  
Muwu Zhang ◽  
Jun Dai ◽  
Changqing Zhang ◽  
Shuzhong Wang ◽  
...  
Keyword(s):  
Output Power ◽  
Traveling Wave ◽  
Broad Band ◽  
High Output Power ◽  
Traveling Wave Tube ◽  
Wave Tube ◽  
Multiple Beam ◽  
W Band ◽  
High Output

Corrugated waveguide slow-wave structure for THz travelling wave tube

2009 ◽  
Author(s):  
Mauro Mineo ◽  
Claudio Paoloni ◽  
Aldo Di Carlo ◽  
Anna Maria Fiorello ◽  
Massimiliano Dispenza
Keyword(s):  
Slow Wave ◽  
Wave Structure ◽  
Travelling Wave ◽  
Slow Wave Structure ◽  
Wave Tube ◽  
Corrugated Waveguide

scholarly journals A compact ultra-wideband (42-54 GHz) mm-Wave Substrate Integrated Waveguide (SIW) cavity slot antenna for of future wireless communications

2019 ◽  
Vol 8 (9) ◽  
pp. 548-552 ◽  
Keyword(s):  
Wireless Communications ◽  
Wide Band ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Ultra Wide Band ◽  
Reflection Coefficients ◽  
Substrate Integrated Waveguide ◽  
Good Efficiency

A compact and robust ultra-wide-band SIW antenna technology is presented. The proposed antenna applies for 42 - 54 GHz applications such as 5 G and future WLAN. The SIW is designed with specific slot configurations. The simulated results show that the SIW antenna resonates throughout the bands of 42 to 54 GHz, making this new antenna cover all applications within this range. The reflection coefficients in all ranges from 42 to 45 GHz are below 10 dB. The antenna achieves good efficiency and gain as well.

scholarly journals Ultra-Wideband Networking

2021 ◽  
pp. 565-569
Author(s):  
Prachi Kandalkar
Keyword(s):  
Narrow Band ◽  
Broad Band ◽  
Wide Band ◽  
Ultra Wideband ◽  
Ultra Wide Band ◽  
Future Change ◽  
Wireless Applications ◽  
Advantages And Disadvantages ◽  
The World ◽  
Recent Developments

Ultra broad band (UWB) has emerged as a leading technology for potential wireless applications due to recent developments in wideband impulse technology, low power and communication. When opposed to traditional narrow band networks, ultra-wide band (UWB) wireless communications takes a completely different approach to wireless communication. The technology is generating a lot of buzz around the world. This paper outlines the characteristics, its applications, and advantages and disadvantages. It main focuses on the future change of UWB.

Sign in / Sign up

Export Citation Format

Share Document