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Dual band tapered slotline radiator for phased array antenna

Keywords:

D.V. Bagno, I.A. Balina, A.Yu. Grinev, A.E. Zaikin


A novel combination of Vivaldi radiator and embedded diplexing filter (fig. 5) is proposed as radiator for linear and two-dimensional wideband active electrically steerable array (AESA) antennas. The diplexer is made of segments of striplines (fig. 2, 3) and is built into the internal volume of radiator\'s three-layer printed circuit board (PCB). This allows Vivaldi\'s ultra-wide bandwidth being splited on two frequency bands (two channels, one in L-band and one in S-band). Fig. 4 shows SWR, insulation and amplitude transfer function unevenness in operating bands 1.0…1.6 and 2.5…3.5 GHz. Each frequency channel has its own physical input (1, 2 in fig. 5) for AESA TX/RX module connection. Full-duplex operation is possible considering that TX/RX modules have its own front-end filters which further improve band-to-band insulation. For effective usage of radiator\'s PCB available surface (which is critical for volume-limited in-line H-plane Vivaldi array and 2D dual polarization «egg-crate» configuration), it is proposed to use the diplexer with series load connection. In this configuration (fig. 6) low-pass and high-pass filters (6 and 5) of the diplexer are placed on the opposite sides of radiator\'s slotline and are connected by a stripline 4 in series with each other. That stripline crosses Vivaldi\'s slotline and excites that slotline thus acing both as stripline-to-slotline transition and a part of balun. Series-load fifth-order diplexer was synthesized (fig. 7), its elements\' geometry has been optimized using custom designed software which is based on matrix apparatus of two-port networks. Results of its numerical modeling (fig. 8) indicate SWR better than 1,3 as well as port-to-port insulation over 23 dB in operating frequency bands.
References:
  1. Balina I.A., Lomovskaja T.A., Mosejjchuk G.F., Sinani A.I. Izluchajushhaja sistema, razmeshhaemaja v otklonjaemom noske kryla // Antenny. 2008. № 9 (136). S. 65–69.
  2. Grinev A.JU., Bagno D.V., Mosejjchuk G.F., Sinani A.I. SHirokopolosnye sistemy izluchenija dlja antennykh sistem s ehlektronnym upravleniem luchom mnogofunkcionalnykh radioehlektronnykh kompleksov // Antenny. 2013. № 3 (190). S. 3–13.
  3. Mattei G., Young L., Jones E. Microwave filters, impedance-matching networks, and coupling structures. Artech House, USA. 1980.
  4. Frontiers in Antennas: Next Generation Design & Engineering / F.B. Gross, ed. McGraw-Hill, USA. 2011.
  5. Zaal R. Spravochnik po raschetu filtrov. M.: Radio i svjaz. 1983.
  6. http://www.filter-solutions.com
  7. http://web.awrcorp.com
  8. Sazonov D.M. Antenny i ustrojjstva SVCH. M.: Vysshaja shkola. 1988.

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