摘要:

A two‐element microstrip antenna array controlled with active phase shifters has been fabricated and tested. The phase and amplitude of the active phase shifter output can be continuously changed by controlling the gate voltages of the dual gate FET. This array can be mounted on aircraft or missiles and be used in the direction finder or adaptive array systems.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676933

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Modified chemical vapor deposition method was used to fabricate single mode optical fibers. Both matched and depressed cladding single mode fibers were designed and fabricated. Loss as low as 0.3 dB/km has been obtained at wavelength 1.55 μm.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676934

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

A new mixed method using modified stability array and mean‐square error (MSE) criterion is proposed for deriving reduced‐order 2‐transfer functions for discrete‐time systems. More precisely, the modified Routh stability array is used to obtain the reduced‐order denominator, thus ensuring stability preservation, while the numerator is obtained by minimizing the mean‐square error between the unit step responses of the original system and reduced model. The main feature of the method is that it does not actually evaluate the system and model responses in the step of minimizing mean‐square error.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676935

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676922

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor