Results 1 to 10 of about 803,088 (203)

Simulations of dual morphology in spiral galaxies [PDF]

, 2002
Gas and stars in spiral galaxies are modelled with the DUAL code, using hydrodynamic and N-body techniques. The simulations reveal morphological differences mirroring the dual morphologies seen in B and K' band observations of many spiral galaxies.
Berman, S. L.
core   +3 more sources

Design of the Wide Dual-Band Rectangular Souvenir Dielectric Resonator Antenna

IEEE Access, 2019
Design of the wide dual-band rectangular souvenir dielectric resonator antenna (DRA) is discussed. The proposed wide dual-band rectangular DRA was excited by using a U-slot.
Xiao Sheng Fang, Shuang Ming Chen
doaj   +1 more source

Dual band combiner for horn antenna [PDF]

, 1980
A corrugated horn antenna, adapted to be coupled to a waveguide at its apex for X-band excitation is further adapted to be connected to waveguides through a circumferential slot for S-band excitation at four distinct phases selected for the desired S ...
Cohn, S. B., Williams, W. F.
core   +1 more source

Miniaturized Ultrawide Stopband Single-Band Filter and Large Frequency Ratio Dual-Band Filter Based on Inhomogeneous Half-Mode T-Septum Waveguide

IEEE Journal of Microwaves
The inhomogeneous half-mode T-septum waveguide (IHMTSG) cavity is analyzed and applied to the design of miniaturized single- and dual-band band-pass filters (BPFs) in this paper.
Zi-Qi Zhang, Liang Zhou
doaj   +1 more source

A Dual Band Branch Line Coupler With Wide Frequency Ratio

IEEE Access, 2019
A dual-band quadrature branch line coupler (BLC) with wide frequency ratio has been proposed in this paper. A dual-band quarter wave (λ/4) transmission line structure with wide frequency ratio operation has also been presented here with closed ...
Aijaz M. Zaidi, Mirza Tariq Beg, Binod K. Kanaujia, Kunal Srivastava, Karumudi Rambabu   +4 more
doaj   +1 more source

Multiple Order Dual-Band Active Ring Filters with Composite Right/Left Handed Cells [PDF]

, 2010
In this paper, a novel dual-band active filter topology is presented. The non-linear phase response of a composite right/left-handed cell is used to achieve the desired dual-band performance.
García Muñoz, Luis Enrique, García Pérez, Oscar Alberto, González Posadas, Vicente, Segovia Vargas, Daniel   +3 more
core   +2 more sources

ANALISIS UNJUK KERJA MULTI BAND CELL PADA GSM DUAL BAND

Techne, 2013
Hierarchical Cell Structure (HCS) merupakan aplikasi yang digunakan oleh provider pada jaringan GSM Dual Band dengan memprioritaskan band 1800 dalam pemilihan sel.
Budihardja Murtianta, Andreas Ardian Febrianto   +1 more
doaj  

A Four-Port Dual-Band Dual-Polarized Antenna for Ku-Band Satellite Communications

Applied Sciences
This paper presents the development of a four-port dual-band dual-polarized antenna for transmitting/receiving (Tx/Rx) applications in Ku-band satellite communications.
Son Trinh-Van, Woo Yong Yang, Hyung Won Cho, Keum Cheol Hwang   +3 more
doaj   +1 more source

Ultra-Thin Metasheet for Dual-Wide-Band Linear to Circular Polarization Conversion With Wide-Angle Performance

IEEE Access, 2020
Satellite communication systems require dual-band circularly polarized (CP) waves to integrate receiving and transmit antennas into one dual-band terminal. Polarization converters play an important role in such a scenario to convert the incoming linearly
Ayesha Kosar Fahad, Cunjun Ruan, Rabia Nazir, Muhammad Saleem, Tanveer Ul Haq, Shahid Ullah, Wenlong He   +6 more
doaj   +1 more source

Novel double-band input coupler for gyroklystron and gyro-TWT

AIP Advances, 2021
A novel input coupler that can operate in two different frequency bands separately is proposed in this paper. The dual-band (X/Ku) signals are input by two rectangular waveguides, respectively, in particular, a Bragg reflector is inserted in one of the ...
Xiaoyan Wang, Dongping Gao, Yong Wang, Fengzhen Zhang   +3 more
doaj   +1 more source