Insertion Loss Characteristics of a Parallel Two-Wire Transmission Line with Equal Line Length Due to a Rectangular Aperture Sizes in Dual Ground Planes

Aim:: Computation of loss factors for one-bit RF MEMS switch over Ku, K and Ka-band for two different insulating substrates. Objective:: Numerical investigation of return loss, insertion loss, isolation loss are computed under both actuated and unactuated states for two different insulating substrates of the 1-bit RF MEMS switch, and corresponding up and down-capacitances are obtained. Methods:: The unique characteristics of a 1-bit RF MEMS switch of providing higher return loss under both actuated and unactuated states and also of isolation loss with negligible insertion loss makes it as a prime candidate for phase shifter application. This is presented in this manuscript with a keen focus on improvement capability by changing transmission line width, and also of overlap area; where dielectric constant of the substrate also plays a vital role. Results:: The present work exhibits very low down-capacitance over the spectrum whereas considerable amount of up-capacitance. Also when overall performance in terms of all loss parameters are considered, switch provides very low insertion loss, good return loss under actuated state and standard isolation loss. Conclusion:: Reduction of transmission line width of about 33% improved the performance of the switch by increasing isolation loss. Isolation loss of -40 dB is obtained at actuated condition in higher microwave spectra for SiO 2 at higher overlap area. Down capacitance of ~ 1dB is obtained which is novel as compared with other published literature. Moreover, a better combination of both return loss, isolation loss and insertion loss are reported in this present work compared with all other published data so far.

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PENGARUH PANJANG SALURAN TRANSMISI TERHADAP TEGANGAN LEBIH TRANSIENT YANG DISEBABKAN KARENA PROSES ENERGIZED PADA SALURAN TRANSMISI 500 KV

GEMA TEKNOLOGI ◽

10.14710/gt.v17i4.8934 ◽

2015 ◽

Vol 17 (4) ◽

Author(s):

Yuniarto Yuniarto

Keyword(s):

Transmission Line ◽

Load Condition ◽

Line Length ◽

Electromagnetic Transients ◽

Dominant Factor ◽

Switch Closure ◽

Closure Operation ◽

High Transmission ◽

Key Word ◽

Voltage Transient

Yuniarto, in this paper explain that the utility of high transmission line result in the transient over voltage in transmission-line will also increasingly higher, mainly for lightning and switching surge. Switching surge is a dominant factor to show up much transient over voltage in the transmission-line in the level of 230 kV or higher, if it is compared with lightning surge. Switching surge is caused by single energized process, the process itself to energize a transmission line in no load condition with energy power through switch closure operation. The research was aiming at observing the influence of transmission-line length to transient over voltage that occurred at the energized process in 500 kV transmission line Ungaran-Pedan, which used EMTP (Electromagnetic Transients Program) to simulate it. The result of simulation showed that the transient over voltage occurred along the transmission-line which caused the higher voltage increase, providing that the line is also longer. Key word : over voltage, transient, EMTP

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Study and analysis of discontinuity by using taper baluns

International Journal of Engineering & Technology ◽

10.14419/ijet.v4i2.4396 ◽

2015 ◽

Vol 4 (2) ◽

pp. 283

Author(s):

Hussein Aldahhan ◽

Bashar Qas Elias

Keyword(s):

Reflection Coefficient ◽

Transmission Line ◽

Insertion Loss ◽

Power Flow ◽

Microstrip Line ◽

Return Loss ◽

Wide Band ◽

Coplanar Stripline ◽

Insertion Losses

A coplanar stripline (CPS) to microstrip line transition (MSL) are designed with high characteristics, such as wide band, low return loss and high insertion loss. Two types of tapers are proposed, exponential and triangular to decreases of discontinuity in the power flow in transmission line. The suggested design achieved reflection coefficient under -10 dB over wide band from 1 GHz to 3 GHz and insertion losses of less than 1 dB.

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A wideband right-angle transition between thin substrate integrated waveguide and rectangular waveguide based on multi-section structure

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078715000185 ◽

2015 ◽

Vol 8 (2) ◽

pp. 185-191 ◽

Cited By ~ 2

Author(s):

Teng Li ◽

Wenbin Dou

Keyword(s):

Insertion Loss ◽

Rectangular Waveguide ◽

Return Loss ◽

Impedance Matching ◽

Experimental Results ◽

Center Frequency ◽

Substrate Integrated Waveguide ◽

Rectangular Aperture ◽

Section Structure ◽

Better Than

In this paper, a novel wideband right-angle transition between thin substrate integrated waveguide (SIW) and rectangular waveguide (RWG) based on multi-section structure operating at center frequency 31.5 GHz is presented. A multi-section SIW with a rectangular aperture etched on the broad wall and two stepped ridges embedded in the RWG flange are introduced to obtain a wide impedance matching. The simulations show that the bandwidth with return loss better than 20 dB is about 17 GHz. In order to verify our designs, two back-to-back transitions with different lengths are fabricated and measured. The experimental results agree well with simulations. The proposed component shows an insertion loss less than 0.44 dB and a return loss better than 14.5 dB over 12.15 GH, which corresponds to 38.57% bandwidth.

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A CRLH TL Transmission Line Structure and its Application to Bandpass Filter Design

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.446-447.865 ◽

2013 ◽

Vol 446-447 ◽

pp. 865-868

Author(s):

Ya Lin Guan ◽

Xin Kun Tang ◽

Shi Lei Zhou

Keyword(s):

Transmission Line ◽

Insertion Loss ◽

Bandpass Filter ◽

Filter Design ◽

Left Handed ◽

Relative Bandwidth ◽

Low Pass ◽

Band Pass ◽

Low Insertion Loss ◽

High Pass

In this paper, a novel bandpass filter (BPF) using the composite right/left-handed transmission line (CRLH-TL) theory is presented.The composite right/left-handed TL with the high-pass characters of left-handed transmission line (LH-TL) and the low-pass characters of right-handed transmission line (RH-TL) are used to construct the bandpass filter.Using this theory,we design a bandpass filter which have an obvious band pass response with a wide passband range from 5.1to 12.9GHz and a low insertion loss of less than 3.1dB. The relative bandwidth is close to 110%. Simulation using ADS demonstrated the viability of the approach.

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Impact of Electrical Topology, Capacity Factor and Line Length on Economic Performance of Offshore Wind Investments

Energies ◽

10.3390/en12163191 ◽

2019 ◽

Vol 12 (16) ◽

pp. 3191 ◽

Cited By ~ 6

Author(s):

Sadik Kucuksari ◽

Nuh Erdogan ◽

Umit Cali

Keyword(s):

Sensitivity Analysis ◽

Transmission Line ◽

Economic Performance ◽

Wind Farm ◽

Line Length ◽

Capacity Factor ◽

Offshore Wind ◽

Farm Size ◽

Energy Yield ◽

Levelized Cost Of Electricity

In this study, an economic performance assessment of offshore wind investments is investigated through electrical topology, capacity factor and line length. First, annual energy yield production and electrical system losses for AC and DC offshore wind configurations are estimated by using Weibull probability distributions of wind speed. A cost model for calculating core energy economic metrics for offshore wind environment is developed by using a discount cash flow analysis. A case study is then conducted for a projected offshore wind farm (OWF) rated 100 MW and 300 MW sizes situated in the Aegean sea. Finally, a sensitivity analysis is performed for AC and DC OWFs with three different capacity factors (e.g., 45%, 55% and 60%) and various transmission line lengths ranging from 20 km to 120 km. The OWF is found to be economically viable for both AC and DC configurations with the estimated levelized cost of electricity (LCOE) ranging from 88.34 $/MWh to 113.76 $/MWh and from 97.61 $/MWh to 126.60 $/MWh, respectively. LCOEs for both options slightly change even though the wind farm size was increased three-fold. The sensitivity analysis reveals that, for further offshore locations with higher capacity factors, the superiority of AC configuration over the DC option in terms of LCOE reduces while the advantage of DC configuration over the AC option in terms of electrical losses is significant. Losses in the AC and DC configurations range from 3.75% to 5.86% and 3.75% to 5.34%, respectively, while LCOEs vary between 59.90 $/MWh and 113.76 $/MWh for the AC configuration and 66.21 $/MWh and 124.15 $/MWh for the DC configuration. Capacity factor was found to be more sensitive in LCOE estimation compared to transmission line length while line length is more sensitive in losses estimation compared to capacity factor.

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