نتایج جستجو برای: antenna phased array
تعداد نتایج: 175671 فیلتر نتایج به سال:
Abstract. Phased array antennas (PAAs) offer many advantages including steering without physical movement, accurate beam pointing, increased scan flexibility in two dimensions, precise PAA element phase and amplitude control to obtain low sidelobes, and reduced power consumption and weight. The complexity associated with controlling the many thousand array elements, while handling the broad ban...
Directional control of received infrared radiation is demonstrated with a phased-array antenna connected by a coplanar strip transmission line to a metal-oxide-metal (MOM) tunnel diode. We implement a MOM diode to ensure that the measured response originates from the interference of infrared antenna currents at specific locations in the array. The reception angle of the antenna is altered by sh...
This paper introduces a new concept of coplanar patch antenna (CPA), which consists of a bow-tie shaped patch surrounded by closely spaced ground conductor and a coplanar waveguide (CPW) feed line. This novel configuration is proposed for use as an element of a phased array antenna specifically designed for radar systems. The main design goal is to devise a patch antenna that operates at 10 GHz...
In this paper, a wideband photonic phased array antenna is demonstrated. The array configuration consists of a 4x1 Vivaldi single-polarization antenna array and an independent photonic phasing system for each element. The phasing network of this array is implemented using two novel photonic phase shifters based on the vector summation approach. A vector sum phase shifter (VSPS), which can be co...
Radiative hyperthermia is a clinically applied cancer treatment modality where antenna design crucial to achieving therapeutic goals. Serving as the building block of phased-array configuration, antennas are typically arranged in cylindrical or elliptical array called applicator. This short communication proposes an phased applicator based on compact, UWB from category double-ridged horn custom...
چکیده ندارد.
One of the novel ultrasonic phased array based scanning methods for ultrasonic imaging in non-destructive test is total focusing method (TFM). This method employs maximum available information of the phased array elements and leads to an improved defect detection accuracy compared to conventional scanning methods. Despite its high detection accuracy, TFM behaves weak in distinguishing the real ...
Advanced satellite communications system needs large-scale satellite-borne antenna with a function of beam steering and/or multiple spot beams to cover wide service area with high antenna gain. Although phased array antenna is very useful for the feed for the large reflector to satisfy the requirements above, it generally causes increase in the equipment weight, feed loss, and complexity in bea...
With the emergence of aperture and focal plane array systems for application in radio astronomy, there is a need for clear definitions of their gain and noise temperature, preferably in terms of a single antenna/receiver system, to enable proper understanding and comparison of system performance. Although in the literature the noise temperature of a phased array receiver was defined in these te...
An array of antennas mounted on vehicles, ships, aircraft, satellites, and base stations is expected to play an important role in fulfilling the increased demand channel requirement for these services. In this paper toolboxes MATLAB will use phased system different purposes extraction information about a validate results antenna comparison made between geometries, also provides background newly...
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