Zobrazeno 1 - 10
of 68
pro vyhledávání: '"J.H. Schaffner"'
Publikováno v:
IEEE Journal on Selected Areas in Communications. 18:310-321
This article presents results of a wide-band measurement campaign conducted at 38 GHz. The objective of the research was to determine multipath and time varying channel behavior of short-hop millimeter-wave point-to-multipoint radio links during vari
Autor:
Adele E. Schmitz, M. Hu, Marko Sokolich, Jonathan J. Lynch, Yakov Royter, H.P. Moyer, C. McGuire, J.H. Schaffner, Joel N. Schulman, R.L. Bowen
Publikováno v:
IEEE Microwave and Wireless Components Letters. 18:686-688
A W-band monolithic microwave integrated circuit (MMIC), including an Sb-heterostructure diode on a GaAs substrate, has been demonstrated. The MMIC also includes the RF choke and output shorting capacitor essential to detector circuits. Additional in
Autor:
R.R. Hayes, J.H. Schaffner
Publikováno v:
Journal of Lightwave Technology. 12:503-511
One method of increasing the efficiency of a high-frequency integrated optic modulator is to use a periodic electrode to repeatedly "correct" the phase mismatch that results from unequal RF and optical propagation velocities. The center frequency of
Autor:
William B. Bridges, J.H. Schaffner
Publikováno v:
IEEE/LEOS 1995 Digest of the LEOS Summer Topical Meetings. Flat Panel Display Technology.
The potential applications of high dynamic range analog r-f photonic links include antenna remoting, photonic-coupled phased-array antennas, and cable-television transmission. This paper compares the results obtained with a number of different modula
Publikováno v:
Summer Topical Meeting Digest on Broadband Analog and Digital Optoelectronics, Optical Multiple Access Networks, Integrated Optoelectronics, Smart Pixels.
Publikováno v:
1999 IEEE 49th Vehicular Technology Conference (Cat. No.99CH36363).
This article presents the results of a fixed millimeter-wave short-hop radio wave propagation study at 38 GHz. A wideband measurement campaign was performed using three cross-campus radio links from April to August 1998 at Virginia Tech. 73,963 power
Publikováno v:
1988., IEEE MTT-S International Microwave Symposium Digest.
The two-port S-parameters of 0.1- mu m gate length AlGaAs/GaAs high-electron-mobility transistors (HEMTs) at W-band (75 to 115-GHz) frequencies were found using a specially constructed six-port network analyzer. In conjunction with the millimeter-wav
Publikováno v:
International Topical Meeting on Microwave Photonics. MWP '96 Technical Digest. Satellite Workshop (Cat. No.96TH8153).
The potential applications of high dynamic range analog RF photonic links include antenna remoting, photonic-coupled phased-array antennas, and cable-television transmission. This paper compares the results obtained with a number of different electro
Autor:
J.H. Schaffner, R.Y. Loo, D.F. Sievenpiper, F.A. Dolezal, G.L. Tangonan, J.S. Colburn, J.J. Lynch, J.J. Lee, S.W. Livingston, R.J. Broas, M. Wu
Publikováno v:
IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.00CH37118).
The requirements for increased functionality within a confined volume will place greater burdens on electromagnetic platforms for air, space, and sea over the next few decades. An important piece of the any solution to these new requirements are tran
Publikováno v:
IEEE Communications Letters. 4:7-8
This paper presents 38-GHz wide-band point-to-multipoint measurement results from various weather events. 73963 measured power delay profiles indicate that multipath can occur due to the foliage and the reflection from wet surfaces during rain. The r