Photonics as an enabling technology for future microwave systems

Nirmalathas, Ampalavanapillai; Novak, D.; Waterhouse, R.B.; Lim, Christina

doi:10.1109/apmc.2000.925977

Cited by 2 publications

(2 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With this choice the 6th time shifter exploits the same TTDU output for two beams. Accordingly, the input-output pairs of the 6th time shifter are (9,20), (32,29) and (1,20) for a beam pointing toward θ 1 , θ 2 and θ 3 , respectively.…”

Section: The 3 Beam -6 Elements Configurationmentioning

confidence: 99%

See 1 more Smart Citation

The Design of an Optical Time Steered Antenna Based on a New Integrated True Time Delay Unit

Capozzoli¹,

Curcio²,

D’Elia³

2013

PIER

View full text Add to dashboard Cite

Abstract-In the framework of wide-band and ultra wide-band array antennas, an Optical Time Steered Antenna (OTSA) is presented, by considering the design strategies of a new True Time Delay (TTD) Control Unit in the Beam Forming Network (BFN). The unit has high reliability, low crosstalk, low switching time and potential low cost, being based on a low cost technology. Furthermore, due to its compactness and modularity, it can be easily grouped with other ones to make a control unit of large arrays. Different strategies and working configurations of the TTD control unit are presented as a trade-off among hardware complexity, insertion loss reduction and beam control capability. The design of an OTSA prototype is discussed by considering a realistic model simulating the behavior of a real world antenna and accounting for unavoidable non-realities, such as random, periodic and systematic errors introduced by each device exploited in the OTSA as well as mutual coupling between radiating elements. An optimal trimming strategy, able to compensate at best for BFN errors and based on the use of suitably located trimmers, is presented. Among other cases, to enlighten the potentialities of the OTSA, an all optical architecture providing a difference beam squint free pattern is also proposed.

show abstract

Section: The 3 Beam -6 Elements Configurationmentioning

confidence: 99%

“…Following a widespread classification, the most promising approaches to realize variable optical time delays can be grouped in two main categories: the Switched Delay Lines (SDL) and the Variable Propagation Velocity Lines (VPVL) [7][8][9].…”

Section: Introductionmentioning

confidence: 99%