Dana J. Jensen

Wajih A. ElSallal; Dana J. Jensen; Robert L. Palandech; Jason Timmerman; James B. West; Yusuf A. Atesal; Berke Cetinoneri; Gabriel M. Rebeiz

A digital beamforming (DBF) prototype that uses compact and low cost Balanced Antipodal Vivaldi Antenna (BAVA) array and SiGe based-receiver is presented. An example is given for a Ku-band DBF system that demonstrates simultaneous reception of two or more full motion videos in a portable device.

Ren Wang; Xinyu Wang; Timothy Chow; Jerry Burman; Scott J. F. Zogg; Fatma Ayhan Sakarya; Dana J. Jensen

In this paper, we investigate the capacity bounds and throughput performance of ad hoc wireless networks with directional antennas. The capacity of a wireless network is constrained by the physical channel capacity and the interference from neighboring nodes. Gupta et al. have shown that in an arbitrary network with n nodes, the upper bound for per-node throughput capacity is O(1/radicn), and even lower under a random network. Directional antennas, especially those with multi-beam forming capabilities, provide higher bandwidth and reduced interference area, which lead to elevated capacity bounds and improved performance. In this paper, we first present a study on the capacity bounds of ad hoc networking with directional antennas, including hybrid antenna patterns that are a mix of multi-beam forming and single-beam forming. We prove that adaptive multi-beam forming system further improves the network capacity over the single-beam directional networks, due to its desirable features of multiple transmission/reception and anti-interference beam-forming. The results show that using adaptive multi-beam antennas can improve the network throughput by multi-fold depending on the number of beams, thus providing an effective means to achieve high data rate and reliable communication for future combat systems

Dana J. Jensen

David K. Baugh; Joseph F. Jiacinto; Robert J. Frank; Michael N. Newhouse; Dana J. Jensen; Kent D. Benson; Daniel M. Zange; Gunther B. Frank; Bruce S. Kloster; Richard L. Robertson; Karl F. Hoech

Robert J. Frank; Scott J. F. Zogg; Gary A. McGraw; Dana J. Jensen; Bernard A. Schnaufer

Thomas A. Courtade; Dana J. Jensen

Jonathan P. Doane; Dana J. Jensen

Dana J. Jensen

Dana J. Jensen; Thomas A. Courtade

Dana J. Jensen; Scott J. F. Zogg