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An RF Phased array can steer the direction of the beam electronically and it brings about benefits in terms of signal to noise ratio (SNR) and directivity. However, testing the phased array generally requires expensive and high performance RF equipment. This increases production test cost and hampers in-field calibration. We present a low-cost, self-compensating Built-In Self-test (BIST) and calibration...
We propose here a compact beam forming network developed for a switched beam antenna array printed on a conical fuze. Due to tight space constraints, the beam former is made of multiple stacked PCB layers; it is designed around 5.2GHz to excite a 12-element antenna array printed on a conical shape. The numerical results demonstrate very attractive performance and they are compared to some measurement...
A method for in situ evaluation of the health and status of individual array elements within a large phased array has been developed and demonstrated at the subarray level. The technique utilizes a special radiating element located in the center of each subarray. This center element is fed with a “reverse” T/R module that operates in the opposite sense of the regular elements in the subarray; that...
A 16-element phased array receiver with built-in-self test (BIST) is demonstrated at 76–84 GHz. The BIST technique employs a miniature capacitive coupler located at the input port of each phased-array channel, and uses the receiver I/Q down-converter to measure the amplitude and phase of each channel. This allows for measuring the response of individual channels if one channel is turned on at a time,...
An X-band phased-array RF integrated circuit with built-in self-test (BIST) capabilities is presented. The BIST is accomplished using a miniature capacitive coupler at the input of each channel and an on-chip I/Q vector receiver. Measurements done with BIST system agree well with S-parameter data and provide the amplitude and phase response over phase states and over frequency. To our knowledge, this...
This paper presents a new architecture together with practical results for a high performance analogue retrodirective array architecture with the following significant advantages: (1) It is able to constructively combine signals on receive, as well as on transmit, a feature not seen before on this type of array, (2) It is capable of operating with real life communication received signal levels as...
In this paper a practical demonstration of a new analogue phase conjugating architecture which has the capability of correcting beam pointing error is described. When applied to a retrodirective antenna application the beam pointing error caused by duplex frequency transmission and reception through the same antenna array, can be corrected. The circuit has high detection sensitivity and is capable...
A 16-element phased-array transmitter based on 4-bit RF phase shifters is designed in 0.18-mum SiGe BiCMOS technology for Q-band applications. The phased-array shows 12.5plusmn1.5 dB of power gain per channel at 42.5 GHz for all phase states and the 3-dB gain bandwidth is 40-45.6 GHz. The input and output return loss is less than -10 dB at 37.5-50 GHz. The transmitter also results in les8.8deg of...
This paper presents a scalable phased-array receiver system that covers a tritave bandwidth of 6-to-18 GHz implemented in a 130nm CMOS process. The single receiver element with a 10-bit phase shifting resolution achieves a maximum phase error of 2.5° within a baseband amplitude variation of 1.5dB for an arbitrary target angle. This dense interpolation provides excellent phase error/offset calibration...
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