scholarly journals A Dual-Band Band-Pass Filter with Overlap Step-Impedance and Capacitively Loaded Hairpin Resonators for Wireless LAN Systems

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
P. Chomtong ◽  
C. Mahatthanajatuphat ◽  
P. Akkaraekthalin
Keyword(s):  
Fundamental Frequency ◽  
Wireless Lan ◽  
Cross Coupling ◽  
Dual Band ◽  
Band Pass Filter ◽  
Harmonic Frequency ◽  
Pass Filter ◽  
Band Pass ◽  
Insertion Losses ◽  
Better Than

This paper presents a dual-band band-pass filter using modified cross-coupled step-impedance and capacitively loaded hairpin resonators for WLAN systems. The proposed filter has been designed to operate at a fundamental frequency of 2.4 GHz and the first harmonics frequency of 5.2 GHz. The techniques of step impedance and load capacitor are combined in the design of the proposed filter. In particular, the techniques of modified cross-coupling and overlap resonators are applied to improve the response of insertion losses at the first harmonic frequency of 5.2 GHz. The simulated and experimental results of insertion losses and return losses are better than 3 dB and 20 dB, respectively, at the operating frequencies.

Design and manufacture of super-multilayer optical filters based on PARMS technology

2018 ◽  
Vol 7 (1-2) ◽  
pp. 49-55
Author(s):  
Shaobo Lü ◽  
Ruisheng Wang ◽  
Jing Ma ◽  
Chao Jiang ◽  
Jiali Mu ◽  
...  
Keyword(s):  
Layer Thickness ◽  
Notch Filter ◽  
Optical Filters ◽  
Dual Band ◽  
Coating Process ◽  
Band Pass Filter ◽  
Optical Monitoring ◽  
Pass Filter ◽  
Band Pass ◽  
Better Than

AbstractThree multilayer interference optical filters, including a UV band-pass, a VIS dual-band-pass and a notch filter, were designed by using Ta2O5, Nb2O5, Al2O3and SiO2as high- and low-index materials. During the design of the coating process, a hybrid optical monitoring and RATE-controlled layer thickness control scheme was adopted. The coating process was simulated by using the optical monitoring system (OMS) Simulator, and the simulation result indicated that the layer thickness can be controlled within an error of less than ±0.1%. The three filters were manufactured on a plasma-assisted reactive magnetic sputtering (PARMS) coating machine. The measurements indicate that for the UV band-pass filter, the peak transmittance is higher than 95% and the blocking density is better than OD6 in the 300–1100 nm region, whereas for the dual-band-pass filter, the center wavelength positioning accuracy of the two passbands are less than ±2 nm, the peak transmittance is higher than 95% and blocking density is better than OD6 in the 300–950 nm region. Finally, for the notch filter, the minimum transmittance rates are >90% and >94% in the visible and near infrared, respectively, and the blocking density is better than OD5.5 at 808 nm.

Fourth-Order Microstrip Band-Pass Filter with Mixed Cross-Coupling

2021 ◽  
Vol 66 (2) ◽  
pp. 211-219
Author(s):  
A. V. Zakharov ◽  
S. A. Rozenko ◽  
S. N. Litvintsev
Keyword(s):  
Fourth Order ◽  
Cross Coupling ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass

scholarly journals W‐band dual‐band waveguide band‐pass filter using dual‐mode cavities

2018 ◽  
Vol 54 (25) ◽  
pp. 1444-1446
Author(s):  
Jianfei Chen ◽  
Sheng Zhang ◽  
Chao Zhang ◽  
Yuehua Li
Keyword(s):  
Dual Band ◽  
Band Pass Filter ◽  
Dual Mode ◽  
Pass Filter ◽  
W Band ◽  
Band Pass

scholarly journals Dual band Stepped Impedance Interdigital Microstrip Filter for LTE Bands

2019 ◽  
Vol 4 (7) ◽  
pp. 28-30
Author(s):  
William Johnson ◽  
Cavin Roger Nunes ◽  
Savio Sebastian Dias ◽  
Siddhi Suresh Parab ◽  
Varsha Shantaram Hatkar
Keyword(s):  
Insertion Loss ◽  
Bandpass Filter ◽  
Dual Band ◽  
Band Pass Filter ◽  
Coupled Resonators ◽  
Microstrip Filter ◽  
Resonant Frequencies ◽  
Pass Filter ◽  
Band Pass ◽  
Low Insertion Loss

In this paper, a dual band microstrip bandpass filter has been proposed utilizing three edge coupled resonators, interdigital stubs and DGS technique. To enhance the coupling degree, two interdigital coupled feed lines are employed in this filter. The suppressing cell consists of stepped impedance ladder type resonators, which provides a wide stopband. The proposed suppressing cell has clear advantages like low insertion loss in the passband and suitable roll off. The frequency response of the filter looks like a standard dual band band-pass filter. The filter exhibits a dual passband with resonant frequencies at 2.2GHz and 3.45GHz covers LTE1 and LTE22 bands.

scholarly journals Study of Microstrip Dual-Band Band Pass Filter

2021 ◽  
Author(s):  
Anciline V ◽  
Maheswari S
Keyword(s):  
Wireless Communication ◽  
Insertion Loss ◽  
Communication System ◽  
Dual Band ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Wireless Communication System ◽  
Band Pass ◽  
Main Component

The main component widely used in wireless communication system is dual-band band pass filter. This band pass filter is intended in many ways and some are microstrip, waveguide, etc. The dual-band will works in two different frequency ranges which will provide a huge application. This paper compares different microstrip dual-band band pass filter based on the techniques, insertion loss, frequency, etc.

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