SUB-MILLIMETER WAVE FREQUENCY SCANNING 8 x 1 ANTENNA ARRAY

Abstract

Abstract-In this work, a sub-millimeter wave frequency scanning 8 × 1 element antenna array is presented for its use in a terahertz imaging system operating in the 220-330 GHz frequency band. The antenna array is formed by eight open ended waveguides, a phaseshifting network implemented with WR-3 rectangular waveguides and a power divider. Dielectric rods are used to improve the radiation patterns at large beam-steering angles. Prototypes of antenna arrays with and without the dielectric rods have been manufactured and experimentally characterized. A beam-steering range greater than 40 • has been obtained for a frequency sweep between 270 GHz and 330 GHz.

A novel phaseless frequency scanning based on indirect holography

“…[1][2][3]). The frequency scanning (FS) simplifies these setups by using an array that provides a different pointing angle for each frequency [4,5]. Although the information obtained with this setup is less complete than in the case of using multiple transmitters and receivers, this simple system is still able to determine the position of the scatterers (see [4,5] and references therein).…”

“…The frequency scanning (FS) simplifies these setups by using an array that provides a different pointing angle for each frequency [4,5]. Although the information obtained with this setup is less complete than in the case of using multiple transmitters and receivers, this simple system is still able to determine the position of the scatterers (see [4,5] and references therein). Despite the simple setup for a FS system, it still requires the acquisition of the amplitude and phase of the signal so that it involves relatively complex and expensive equipment.…”

Millimeter Wave Cavity Backed Microstrip Antenna Array for 79 GHZ Radar Applications

“…Millimeter wave (MMW) applications have become increasingly important in recent years, both in communications and in sensing [1,2]. The latter is currently dominated by automotive radar, but it is expected that millimeter wave sensing applications are to follow the growth of millimeter wave communications.…”

Frequency scanning slotted waveguide in the sub-millimeter wave band

“…Different types of metallic waveguide antenna arrays have been presented [1]- [2], but the waveguide slotted antenna array has been chosen for its compactness and its design flexibility.…”