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Application of fiber laser array for free-space communication has great predominance. This paper studies the far field properties of the fiber laser phased array. An analytical expression for the far field pattern is obtained based on the Huygens-Fresnel principle. The far field properties, the scanning/steering angle range, and the angular resolution are numerically studied. It is found that for...
We have used silicon technologies to build highly dense phased array for X to W-band applications. Typical designs include an 8-element 8-16 GHz SiGe phased array receiver, a 16-element 30-50 GHz SiGe transmit phased array, a miniature (<; 3mm2) and low power (<;100 mW) CMOS phased array receiver at 24 GHz, and a 4-element SiGe/CMOS Tx/Rx phased array at 34-38 GHz with 5-bit amplitude and phase...
In this paper, we present vector modulation technology in millimeter-wave active phased array antenna (APPA) as a replacement of conventional digital phase shifter and digital attenuator. Both a 1×8 Ka-Band active phased sub-array antenna and an 8×8 Ka-Band active phased array antenna are developed to verify vector modulation technology in millimeter-wave active phased array antenna, respectively...
This paper introduces the achievement and progress in the research on pattern reconfigurable antenna and its application in phased array, in Computational Electromagnetic Laboratory (CEMLAB) at UESTC. Several typical pattern reconfigurable antennas are introduced. A phased array composed of one kind of pattern reconfigurable elements is simulated on plane platform and conformal platform, and the array...
Novel avionics communication systems are required for increasing flight safety and operational integrity, for optimizing economy of operations and for enhancing passenger services. One of the key technologies to be developed is an antenna system that will provide broadband connectivity within aircraft cabins at an affordable price. This paper describes the development of an electronically steered...
A coherent Uplink Array consisting of two or three 34-meter antennas of NASA's Deep Space Network has been developed for the primary purpose of increasing EIRP at the spacecraft. Greater EIRP ensures greater reach, higher uplink data rates for command and configuration control, as well as improved search and recovery capabilities during spacecraft emergencies. It has been conjectured that Doppler-delay...
The Aviation and Missile Research, Development and Engineering Center has been involved in a research and development program aimed at furthering phased arrays for both tactical seekers and communication links. The program has been pursuing both MicroElectroMechanical Systems (MEMS) and MMIC-based phase shifters with an overall goal of affordability traded against performance. In a collaborative effort...
By using open ended parallel plate waveguides (often called TEM horn antennas) a new concept for an electronically steerable phased array antenna is shown. The concept allows a usable bandwidth of more than 100% and is suitable for full duplex communication systems. It provides orthogonal polarizations (both linear and circular) for both the transmit and receive paths. Configured as a two-dimensional...
A phased array has been designed for maritime satellite communication applications. The antenna consists of 26 patch elements that are mounted on a nearly spherical aperture. The antenna allows full duplex communication via L-band satellite systems like Inmarsat BGAN or Thuraya. This design is an innovative and powerful alternative to current mechanically steered systems. Intermediate results of this...
The reduction of design and production time is an important factor in the actual Economic System. Near Field measurement techniques give fast and accurate way for complete characterization of antennas. This paper describes the spherical near field test bench by SATIMO called “StarLab” that works in 0.8 to 18 GHz frequency band . Measured patterns of some different antennas will be presented and compared...
The high power transmitter active integrated phased array antenna and the rectenna array for the microwave wireless communication and power transmission are demonstrated at 5.8 GHz. The 4 W high power GaAs FET amplifier was developed for the transmitter antenna with the total power of 120 W. The average distance to the rover was 2.5 m. The active integrated phased array antenna with the beam steering...
We report simulated statistics (average and RMS) of the phase delay and attenuation, due to rain, that can be measured in phased array antennas with elements spaced in the range 500~2250 m, at 32 GHz, in 31° elevation paths. The phase delay can be larger than that tolerated in deep-space communication. Phase delay and attenuation due to rain can reduce the overall array gain. The results could be...
This work presents a new and cost effective MEMS (Micro Electro-Mechanical System) technology for the realization of three-dimensional broadband micro-antenna structures and phased array structures for GHz and THz frequency range. A tapered helical antenna has been realized with MEMS technology and the use of such structure in phased arrays between 0.6 and 1.0 THz is simulated and presented.
Among the many photonic technologies available for antenna beamforming, those which provide flat RF response over a very wideband RF bandwidth, high signal to noise ratio, multiple-beam capabilities and minimum complexity are to be preferred.
The present day radio telescopes with single-beam feeds can achieve the dynamic range up to 106:1 in the beam on-axis direction. However, the off-axis dynamic range is severely limited by uncertainties and temporal instability in the beam patterns. A number of calibration techniques for dealing with these effects have been proposed and used in practice. For nove lphased-array based telescopes, the...
Phased array antennas with a desired symmetric scan range about broadside usually are designed with array elements that have a corresponding symmetry. However, this appears to be unnecessarily restrictive. We 1) show that symmetric scan performance normally is maintained even with asymmetric array elements, and 2) compare conventional, symmetric patches with asymmetric patches, which have no E-plane...
In this paper a phased array antenna for maritime satellite communications is described. The antenna consists of 26 patch elements that are mounted on a soccer-like spherical aperture. The antenna allows full duplex communication via L-band satellite systems like Inmarsat BGAN or Thuraya. This design is an innovative and powerful alternative to current mechanically steered systems. Intermediate results...
In this paper, a novel phaseless-measurement method is proposed to measure complex element fields for phased array calibrations. In general phased arrays, an element field in one phase shift is different from the other ones because phase shifters, which are usually digital ones, have some transmitting errors at every phase shift. The proposed method can determine a complex element field at every phase...
This work presents the advances in the development of an innovative flat array antenna for Ku-band mobile satellite terminals. The antenna is conceived to allow a bi-directional high data rate satellite link. The available circular surface (diameter 110 cm) integrates both a transmitting and a receiving section, operating in orthogonal linear polarizations. The TX frequency range is fully covered...
This paper deals with the design of a Ku-band phased array antenna where phase shifting is performed through the use of reflection-type phase shifters controlled with varactor diodes. The paper describes a new calibration method which can provide the bias voltage to be applied to each phase shifter in order to scan the beam in the desired direction. This method is based on the use of a microstrip...
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