Results 81 to 90 of about 12,617 (191)

Coplanar waveguide feeds for phased array antennas [PDF]

The design and performance is presented of the following Coplanar Waveguides (CPW) microwave distribution networks for linear as well as circularly polarized microstrip patches and dipole arrays: (1) CPW/Microstrip Line feed; (2) CPW/Balanced Stripline ...
Lee, Richard Q., Simons, Rainee N.
core   +1 more source

High-gain self-steering microwave repeater, volume 1 Final engineering report, Jan. 1966 - Apr. 1969 [PDF]

Engineering model of high gain self steering microwave transponder and application to satellite communication ...
Birgenheier, R. A., Kummer, W. H.
core   +1 more source

Performance optimization of microstrip antenna array using frequency selective surfaces

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents the application of frequency selective surfaces in antenna arrays as an alternative to improve radiation parameters of the array.
Valdez A. Almeida Filho, Antonio Luiz P. S. Campos   +1 more
doaj   +1 more source

Antennas for mobile satellite communications [PDF]

A NASA sponsored program, called the Mobile Satellite (MSAT) system, has prompted the development of several innovative antennas at L-band frequencies. In the space segment of the MSAT system, an efficient, light weight, circularly polarized microstrip ...
Huang, John
core   +1 more source

Numerical synthesis of filtering antennas [PDF]

, 2015
Dizertační práce je zaměřena na kompletní metodiku návrhu tří a čtyř prvkových flíčkových anténních řad, které neobsahují žádné filtrující části a přesto se chovají jako filtrující antény (filtény).
Kufa, Martin
core  

Balanced superconductor-insulator-superconductor mixer on a 9~$\mu$m silicon membrane

, 2011
We present a 380-520 GHz balanced superconductor-insulator-superconductor (SIS) mixer on a single silicon substrate. All radio-frequency (RF) circuit components are fabricated on a $9 \mu$m thick membrane.
Honingh, C. E., Jacobs, K., Justen, M., Schultz, M., Stutzki, J., Westig, M. P.   +5 more
core   +1 more source

MODELING OF THE RADIO DIRECTION FINDING PROCESS BY DIGITAL ANTENNA ARRAYS TAKING INTO ACCOUNT THE EFFECT OF MUTUAL COUPLING OF ANTENNA ELEMENTS

Надежность и качество сложных систем
Background. The effect of mutual coupling of antenna elements can have a significant impact on the characteristics of complex, sensitive systems. This effect changes the shape of the directional patterns of antenna elements, changes their active ...
I.V. Peshkov, V.A. Zhigulin, N.A. Fortunova   +2 more
doaj   +1 more source

Performance optimization of microstrip antenna array using frequency selective surfaces

Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2014
This paper presents the application of frequency selective surfaces in antenna arrays as an alternative to improve radiation parameters of the array.
Valdez A. Almeida Filho, Antonio Luiz P. S. Campos   +1 more
doaj  

A microstrip array feed for MSAT spacecraft reflector antenna [PDF]

An L-band circularly polarized microstrip array antenna with relatively wide bandwidth has been developed. The array has seven subarrays which form a single cluster as part of a large overlapping cluster reflector feed array.
Huang, John
core   +1 more source