Rotman lens is a true-time-delay beam forming network with parallel plate structure. Owing to its frequencyindependency and wide-band operation, it has gained vast applications as feeding element of linear array antennas. However, the lens suffers from high intrinsic power loss and the problem worsens in microstrip structures by their inevitable dielectric loss. On the other hand, waveguides ex...

This paper, which describes the optimization of a novel, constrained feed network for a space-based antenna array, is a joint effort between the Air Force Research Laboratory (AFRL) Antenna Technology Branch at Hanscom AFB and the Illinois Genetic Algorithms Laboratory (IlliGAL) at the University of Illinois at Urbana-Champaign. Recently, under the guidance and direction of the Air Force Office...

A beam-switching array is designed using a 4×6 Rotman lens as beam-forming network to switch the beam towards -30°, -10°, 10°, and 30°. Six substrate integrated waveguide fed 1×4 microstrip patch arrays are used radiating elements. The on LTCC operate at 71-76 GHz. In this work, feasibility of implementing with vector modulator (VM) circuit switching element studied for first time. measured rad...

In this letter, we present a planar half-Luneburg lens antenna based on glide-symmetric dielectric structure. The proposed provides compact alternative to beamformers such as conventional Luneburg and Rotman lenses, well pillbox antennas. Importantly, demonstrate that the peak gain of is less than 1 dB lower antenna, despite being almost half size. can steer its beam in 50 <inline-formula xmlns...

Multi-beam approaches using beam-forming antenna array architectures have been identified as one solution for overcoming the limited fields-of-view provided by highly directional mm-wave sensors. Rotman lenses offer a compact, rugged and reliable alternative to electronically scanned antenna technologies but architectures that operate at frequencies < 20 GHz perform poorly at higher frequencies...

A proper antenna to couple to a microstrip Microwave Kinetic Inductance Detector (MKID) is designed and simulated. A twin-slot microstrip-fed inline antenna is designed for frequency band of 600-720~GHz integrated with an elliptical lens and coupled to the MKID. A systematic design procedure for design of such antenna with microstrip inline feeding is presented. Whole structure of lens and twin...