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Phase distributions of dome antenna with forced interception

Keywords:

V.I. Litun, V.N. Mitrokhin


Providing of ultra wide range electrical beam scanning is possible for planar array antenna (AA) by combining with passive divergent dome lens (DL, up to 3/2 of hemisphere [1]). Also DL can be used to protect AA elements from negative environmental conditions [2]. The dome antenna (DA) consists of primary AA (classical, active or digital) and passive DL (fig. 1). Discrete waveguide-based structure (fig. 2) is preferred for electrically big DA of upper cm-band and lower mm-band. Possibility of optimal DL shape approximation by a sphere is shown in [4]. That sphere\'s center is moved along the system axis from AA plane. The geometry of such quasi-optimal DA (fig. 3) can be described by: R – DL inner radius; h – center displacement value; L – DL thickness. Electrical characteristics of DA are scanning angle amplification factor (SAAF) K(θ) (which is the ratio of system\'s scanning angle to primary AA scanning angle) and primary AA phase.
References:
  1. Bubnov G.G., Golberg B.KH., Korostyshevskijj E.H. i dr. Uvelichenie sektora skanirovanija antennojj reshetki s pomoshhju kupolnojj linzy // Sb. nauch.-metodicheskikh statejj po prikladnojj ehlektrodinamike. 1983. Vyp. 6. M.: Vysshaja shkola. S. 162–188.
  2. Bejj N.A., Skvorcov B.C., Kovalev A.A., Komjagin R.V. Skhemy postroenija antenn dlja radiolokacionnykh kompleksov povyshennojj zashhishhennosti // Vestnik MGTU im. N.EH. Baumana. Ser. Priborostroenie. Spec. vyp. Antenny i ustrojjstva radio- i opticheskogo diapazonov. 2009. S. 58–62.
  3. Litun V.I., Mitrokhin V.N. Kupolno-linzovye antenny // Vestnik MGTU im. N.EH. Baumana. Ser. Priborostroenie. 2012. № 2. S. 87–100.
  4. Litun V.I., Mitrokhin V.N. Approksimacija optimalnojj obrazujushhejj kupolno-linzovojj antenny // Vestnik MGTU im. N.EH. Baumana. Ser. Priborostroenie. 2012. № 3. S. 68–74.
  5. Xiang Z.-P. Theoretical calculation of phased array lens antenna // Military microwaves. Conference Proceedings \'82. London, England. 1982. P. 506–511.

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