Results 31 to 40 of about 72,244 (304)

Improving the system capacity of broadband services using multiple high-altitude platforms [PDF]

, 2005
A method of significantly improving the capacity of high-altitude platform (HAP) communications networks operating in the millimeter-wave bands is presented. It is shown how constellations of HAPs can share a common frequency allocation by exploiting the
Chen, G.H., Grace, D., Thornton, J., Tozer, T.C., White, G.P.   +4 more
core   +1 more source

Concentrated Ground Plane Booster Antenna Technology for Multiband Operation in Handset Devices [PDF]

, 2014
The current demand in the handset antenna field requires multiband antennas due to the existence of multiple communication standards and the emergence of new ones.
Andujar, A., Anguera, J., Bujalance, A., Picher, C., Puente, C.   +4 more
core   +8 more sources

A New Antenna Capable of Generating Broadband Plane Spiral Orbital Angular Momentum

IEEE Access
The plane spiral orbital angular momentum (PS-OAM), which is a special form of orbital angular momentum (OAM) beams, solves the problem of OAM beam divergence to some extent.
Na Li, Guirong Feng, Ping Li, Xiaowei Shi   +3 more
doaj   +1 more source

A Compact Broadband Stepped Bow-Tie Antenna for Ambient RF Energy Harvesting

IEEE Access, 2023
This paper presents a compact broadband stepped bow-tie antenna for ambient RF energy harvesting (RFEH). The proposed antenna consists of stepped shapes for wide bandwidth, making it possible to investigate ambient RF energy in entire cellular bands.
Seong-Jin Kim, Sol Kim, Ji-Hoon Lee, Jong-Won Yu   +3 more
doaj   +1 more source

Antenna systems for broadband wireless access [PDF]

IEEE Communications Magazine, 2002
Broadband wireless access along with evolving mobile Internet and multimedia services are driving the surge of research and development activities for future wireless communication systems. We provide an overview of antenna systems for broadband wireless communications and introduce some of the important issues surrounding them.
Ross D. Murch, Khaled Ben Letaief
openaire   +2 more sources

Conformal phased array with beam forming for airborne satellite communication [PDF]

, 2008
For enhanced communication on board of aircraft novel antenna systems with broadband satellite-based capabilities are required. The installation of such systems on board of aircraft requires the development of a very low-profile aircraft antenna, which ...
Heideman, R.G., Hulzinga, A., Jorna, P., Leinse, A., Meijerink, A., Roeloffzen, C.G.H., Schippers, H., Verpoorte, J., Wintels, M.   +8 more
core   +2 more sources

Development Toward a Ground-Based Interferometric Phased Array for Radio Detection of High Energy Neutrinos [PDF]

, 2017
The in-ice radio interferometric phased array technique for detection of high energy neutrinos looks for Askaryan emission from neutrinos interacting in large volumes of glacial ice, and is being developed as a way to achieve a low energy threshold and a
Avva, J., Bechtol, K., Chesebro, T., Cremonisi, L., Deaconu, C., Gupta, A., Ludwig, A., Messino, W., Miki, C., Nichol, R., Oberla, E., Ransom, M., Romero-Wolf, A., Saltzberg, D., Schlupf, C., Shipp, N., Varner, G., Vieregg, A. G., Wissel, S. A.   +18 more
core   +2 more sources

A Design of Double Broadband MIMO Antenna

International Journal of Antennas and Propagation, 2015
The MIMO antenna applied to LTE mobile system should be miniaturization and can work in the current communication frequency band; isolation between each antenna unit also should be good so as to reduce loss of radio wave energy and improve the antenna ...
Yanfeng Geng, Runbo Ma, Baoming Chen, Wenmei Zhang   +3 more
doaj   +1 more source

Integrated Broadband Bowtie Antenna on Transparent Silica Substrate

, 2016
The bowtie antenna is a topic of growing interest in recent years. In this paper, we design, fabricate, and characterize a modified gold bowtie antenna integrated on a transparent silica substrate.
Chen, Ray T., Chung, Chi-Jui, Pan, Zeyu, Subbaraman, Harish, Wang, Shiyi, Zhan, Qiwen, Zhang, Xingyu   +6 more
core   +1 more source

Frequency Domain Hybrid-ARQ Chase Combining for Broadband MIMO CDMA Systems [PDF]

, 2009
In this paper, we consider high-speed wireless packet access using code division multiple access (CDMA) and multiple-input multiple-output (MIMO). Current wireless standards, such as high speed packet access (HSPA), have adopted multi-code transmission ...
Ait-Idir, Tarik, Chafnaji, Houda, Saoudi, Samir, Vasilakos, Athanasios V.   +3 more
core   +4 more sources