scholarly journals Design of Fundamental Power Coupler of 5 Cell Elliptical SRF Cavity Using CST Microwave Studio

2020 ◽  
pp. 13-24
Author(s):  
Rajdip Das ◽  
B. N. Biswas
Keyword(s):  
Mechanical Stability ◽  
Q Value ◽  
Frequency Range ◽  
Elliptical Cavity ◽  
Cavity Structure ◽  
Current Design ◽  
Waveguide Type ◽  
5 Ghz ◽  
Srf Cavity ◽  
Cst Microwave Studio

A 5 cell elliptical cavity prototype has been build to accelerate the 100 MeV high beam of protons [1]. For cavity = 0.61 β g at 650 MHz in which the cavity structure is optimized by using the code from SUPERFISH [2]. The Q value of the cavity measured is 0.61x109 for 4.2 K. In the frequency range 2 – 5 GHz with CST MICROWAVE STUDIO [3]. It has been designed taking into account the advantages of both the waveguide type and coaxial type coupler This paper explains the current design of the cavity with a different angle of aperture and wall which have better mechanical stability and flatness, consisting of facilities for surface processing and less loss of beam. In this paper, the fundamental power coupler of a 5-cell 650MHz elliptical SRF cavity has been designed using CST MICROWAVE STUDIO. Here we have considered the ceramic window matching and co-axial to rectangular waveguide matching for the power coupler.

Microwave wide band absorption by carbon from Corn cob-1

2016 ◽  
Vol 12 (2) ◽  
pp. 4204-4212 ◽  
Author(s):  
Maheshwar Sharon ◽  
Ritesh Vishwakarma ◽  
Abhijeet Rajendra Phatak ◽  
Golap Kalita ◽  
Nallin Sharma ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Agricultural Waste ◽  
Wide Band ◽  
Nickel Nitrate ◽  
Equivalent Amount ◽  
Frequency Range ◽  
Corn Cob ◽  
Different Temperatures ◽  
Band Absorption ◽  
5 Ghz

Corn cob, an agricultural waste, is paralyzed at different temperatures (700oC, 800oC and 900oC). Microwave absorption of carbon in the frequency range of 2 GHz to 8 GHz is reported. Carbon activated  with 5%  nickel nitrate showed more than 90% absorption of microwave in the frequency range from 6 GHz to 8 GHz, while carbon activated  with 10% Nickel nitrate treated corn cob showed 90% absorption  in the frequency range of 2.5 GHz to 5 GHz. Carbon showing the best absorption are characterized by XRD, Raman spectra and SEM . It is suggested that corn cob treatment   alone with KOH did not improve the microwave absorption, whereas treatment along with nickel nitrate improved the absorption property much better. It is proposed that treatment with nickel nitrate helps in creating suitable pores in carbon   which improved the absorption behavior because while treating carbon with 1N HCl helps to leach out nickel creating equivalent amount of pores in the carbon.

The Pitch Angles of Electrons in Jupiter’s Radiation Belt

1976 ◽  
Vol 3 (1) ◽  
pp. 53-55 ◽  
Author(s):  
J. A. Roberts
Keyword(s):  
Radio Emission ◽  
Pitch Angle ◽  
Radiation Belt ◽  
Synchrotron Emission ◽  
Angle Distribution ◽  
Space Probe ◽  
Frequency Range ◽  
Pitch Angle Distribution ◽  
5 Ghz ◽  
Apparent Conflict

The radio emission from Jupiter in the frequency range from ∽ 50 MHz to ∽ 5 GHz is mainly synchrotron emission from electrons in the intense radiation belt which surrounds Jupiter out to several planetary radii. Information about the pitch angles of these electrons can be derived both from the radio observations and from the Pioneer space probe observations. In this communication we discuss the pitch angle distribution inferred from the radio data and the apparent conflict with the Pioneer data.

A Dual-Mode Microwave Applicator for Liver Tumor Thermotherapy

Frequenz ◽  
2018 ◽  
Vol 72 (3-4) ◽  
pp. 141-149 ◽  
Author(s):  
Carolin Reimann ◽  
Martin Schüßler ◽  
Rolf Jakoby ◽  
Babak Bazrafshan ◽  
Frank Hübner ◽  
...  
Keyword(s):  
Power Consumption ◽  
Liver Tumor ◽  
Thermal Ablation ◽  
Multimodal Imaging ◽  
Microwave Ablation ◽  
Dielectric Analysis ◽  
Frequency Range ◽  
Dual Mode ◽  
Microwave Applicator ◽  
5 Ghz

Abstract The concept of a novel dual-mode microwave applicator for diagnosis and thermal ablation treatment of tumorous tissue is presented in this paper. This approach is realized by integrating a planar resonator array to, firstly, detect abnormalities by a relative dielectric analysis, and secondly, perform a highly localized thermal ablation. A further essential advantage is addressed by designing the applicator to be MRI compatible to provide a multimodal imaging procedure. Investigations for an appropriate frequency range lead to the use of much higher operating frequencies between 5 GHz and 10 GHz, providing a significantly lower power consumption for microwave ablation of only 20 W compared to commercial available applicators.

High Dielectric Low Loss Transparent Glass Material Based Dielectric Resonator Antenna with Wide Bandwidth Operation

Frequenz ◽  
2014 ◽  
Vol 0 (0) ◽  
Author(s):  
Arshad Mehmood ◽  
Yuliang Zheng ◽  
Hubertus Braun ◽  
Martun Hovhannisyan ◽  
Martin Letz ◽  
...  
Keyword(s):  
Dielectric Resonator ◽  
Return Loss ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Frequency Range ◽  
Low Loss ◽  
Glass Material ◽  
High Dielectric ◽  
5 Ghz ◽  
Microstrip Feed

AbstractThis paper presents the application of new high permittivity and low loss glass material for antennas. This glass material is transparent. A very simple rectangular dielectric resonator antenna is designed first with a simple microstrip feeding line. In order to widen the bandwidth, the feed of the design is modified by forming a T-shaped feeding. This new design enhanced the bandwidth range to cover the WLAN 5 GHz band completely. The dielectric resonator antenna cut into precise dimensions is placed on the modified microstrip feed line. The design is simple and easy to manufacture and also very compact in size of only 36 × 28 mm. A −10 dB impedance bandwidth of 18% has been achieved, which covers the frequency range from 5.15 GHz to 5.95 GHz. Simulations of the measured return loss and radiation patterns are presented and discussed.

scholarly journals Center-Slotted Wideband Hybrid 10 dB Coupler

2021 ◽  
Author(s):  
Sehabeddin Taha Imeci ◽  
◽  
Kemal Temur ◽  
Keyword(s):  
Directional Coupler ◽  
Return Loss ◽  
Frequency Range ◽  
Coupling Region ◽  
Parallel Lines ◽  
Manufacturing Errors ◽  
Final Design ◽  
Hybrid Coupler ◽  
5 Ghz ◽  
Good Agreement

In this paper, a wideband microstrip hybrid coupler designed, simulated, built and tested. These couplers have advantage of easy fabrication, lightweight and incorporation with other microwave devices and validated using 3D planar electromagnetic softwares like Sonnet Suites. The final design is composition of two parallel lines with symmetric slits and a center slot. Directional coupler is designed and simulated to operate in the frequency range from 1 GHz to 5 GHz with 2.4 Ghz coupling -10 dB return loss bandwidth between 1.6 - 4 GHz. The fabricated coupler shows good agreement between measured and simulated results with very low isolation characteristics. Four symmetric orthogonal U-Shaped structures at the center of the coupling region distinguishes the proposed design with other works. It makes significant improvement in calculation duration thereby achieving lower response latency and lowers the possible manufacturing errors compared with previously published similar works.

Electrical Characterization of High Performance Memory FBGA BOC Package

2006 ◽  
Vol 3 (1) ◽  
pp. 44-51
Author(s):  
M. Gospodinova ◽  
G. Nan ◽  
J. Thomas ◽  
R. Subraya ◽  
J. Held
Keyword(s):  
High Performance ◽  
Model Simulation ◽  
Electrical Characterization ◽  
Frequency Range ◽  
Lumped Model ◽  
Time Domain Signal ◽  
Fine Pitch ◽  
S Parameter ◽  
On Chip ◽  
5 Ghz

A multilayer Fine-pitch Ball Grid Array (FBGA) Board-on-chip (BOC) memory package used for applications running at more than 1 Gbit/p/s has been characterized using S-(distributed) parameter measurements and three types of test chips made using state of the art technology. The low parasitics FBGA test board itself was characterized for frequencies up to 5 GHz (the frequency range of interest) with the transmission being greater than −0.12 dB below 5 GHz. S-parameter model simulation of the package itself indicated that the transmission was greater than −1.5 dB up to 5 GHz. Correlation between the S-parameter simulation and measurements for the package and fixture combined was acceptable - in the order of tenths of dB in the frequency range DC to 2.5 GHz. Comparison of the S-parameter model versus lumped (RLC) model in the frequency range from DC to 5 GHz showed that the lumped model can be used for frequencies up to 2.9 GHz. A high degree of correlation between simulation and measurement has been shown. The lumped model bandwidth has been assessed and its application limits for time domain signal integrity simulations have been evaluated.

Surface-acoustic-wave devices for the 2.5–5 GHz frequency range based on longitudinal leaky waves

2003 ◽  
Vol 82 (19) ◽  
pp. 3351-3353 ◽  
Author(s):  
T. Makkonen ◽  
V. P. Plessky ◽  
W. Steichen ◽  
M. M. Salomaa
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Frequency Range ◽  
Leaky Waves ◽  
Acoustic Wave Devices ◽  
5 Ghz

scholarly journals Compact Wideband Broadside-Coupled Microstrip-Slot Bandpass Filter for Communication Applications

2017 ◽  
Vol 5 (3) ◽  
pp. 650
Author(s):  
Norhudah Seman ◽  
Dyg Norkhairunisa Abang Zaidel ◽  
Zuhaili Amalina Abd. Wahid ◽  
Nor Azimah Mohd Shukor ◽  
Tharek Abd Rahman
Keyword(s):  
Reflection Coefficient ◽  
Insertion Loss ◽  
Bandpass Filter ◽  
Frequency Range ◽  
Compact Size ◽  
Low Insertion Loss ◽  
5 Ghz ◽  
Side Coupling

<p>This paper proposes a compact size design of wideband bandpass filter (BPF). The broad-side coupling microstrip-slot technique is used to accomplish a good passband response with very low insertion loss across a wideband frequency range. The BPF that is designed using Rogers RO4003C substrate shows a good performance with the respective maximum reflection coefficient and insertion loss of -10 dB and 1.2 dB between 0.92 GHz and 5 GHz. This type of BPF filter is useful in any communication applications.</p>

Sign in / Sign up

Export Citation Format

Share Document