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18-140GHz Cassegrain Antenna

Cassegrain antenna

ELVA-1 has developed a low cost high performance microwave antennas to meet needs of the broadband market. These antennas are dual reflector Cassegrain type ECA - XX series.  Antennas of ECA - XX series are available for frequencies from 26.5GHz to 140GHz with reflector diameters ranging from 100mm to 600mm. The gain is up to 53dBi depending upon the frequency. The main reflector has a highly accurate surface and is designed from aluminium.The subreflector is a machined aluminium hyperboloid or ellipsoid, which is rigidly supported by special plastic cylinder.

These antennas are designed to have minimal cross-section to reduce aperture blockage, and hence produce low sidelobe levels (typically 18dB). Typical VSWR is 1.25:1. The gain of the antenna depends upon its diameter. The antenna feed is a circular waveguide of appropriate diameter with an optional circular-to-rectangular transition. 

Custom band antennas for 110-170 GHz are also available by special orders. Each antenna can be shipped with antenna bracket and radome as standard options.

  • High gain
  • Wide band operation
  • High efficiency
  • Low VSWR

Applications

  • PtP and PMP radio links
  • Radars
  • Radio Astronomy

Specifications for Cassegrain antenna ECA - XX series

K band. 18-26.5 GHz

Part No Diameter of main reflector (mm) Gain dB,(typ) Bandwidth in deg. at 3dB level (typ) VSWR (typ)
ECA-K-42-100 100 24.3 7.2 1.4
ECA-K-42-200 200 30.8 3.5 1.35
ECA-K-42-300 300 34.3 2.4 1.25
ECA-K-42-450 450 38.9 1.6 1.25
ECA-K-42-600 600 40.9 1.1 1.25

Losses in a Protected cover is 0,5 dB (max)
Feed waveguide is circular or rectangular
Information for Ordering : X= Number for type of feed waveguide

Available types of Circular waveguides are:

Number Frequency Band (GHz) Diameter of Waveguide (inch) Flange
X=0 17.5-20.5 0.455 UG-381/U
X=1 20.0-24.5 0.396 UG-381/U
X=2 24.0-26.5 0.328 UG-381/U
Available type of Rectangular waveguide is:
X=42 18 -26,5 WR-42 UG-595/U

 

Ka band. 26,5-40 GHz

Part No Diameter of main reflector (mm) Gain dB,(typ) Beamwidth in deg. at 3dB level (typ) VSWR (typ)
ECA-Ka-X-100 100 26.3 6 1.4
ECA-Ka-X-200 200 32.7 2.9 1.35
ECA-Ka-X-300 300 36.4 2 1.25
ECA-Ka-X-450 450 40.9 1.3 1.25
ECA-Ka-X-600 600 42.9 0.9 1.25

Losses in a Protected cover is 0,7 dB (max)
Feed waveguide is circular or rectangular
Information for Ordering : X= Number for type of feed waveguide

 Available types of Circular waveguides are:

Number Frequency Band (GHz) Diameter of Waveguide (inch) Flange
X=0 26.0-28.5 0.328 UG-381/U
X=1 28.5-33.0 0.281 UG-381/U
X=2 33.0-38.5 0.25 UG-381/U
X=3 38.5-43.0 0.219 UG-381/U
Available type of Rectangular waveguide is:
X=28 26,5-40 WR-28 UG-599/U
UG-381/U
UG-600

 

Q band. 33-50 GHz

Part No Diameter of main reflector (mm) Gain dB,(typ) Beamwidth in deg. at 3dB level (typ) VSWR (typ)
ECA-Q-X-100 100 28.3 4.8 1.4
ECA-Q-X-200 200 34.6 2.3 1.35
ECA-Q-X-300 300 38.5 1.6 1.25
ECA-Q-X-450 450 42.9 1 1.25
ECA-Q-X-600 600 44.9 0.7 1.25

Losses in a Protected cover is 0,7 dB (max)
Feed waveguide is circular or rectangular
Information for Ordering : X= Number for type of feed waveguide

Available types of Circular waveguides are:

Number Frequency Band (GHz) Diameter of Waveguide (inch) Flange
X=0 33.0-38.5 0.25 UG-383/U
X=1 38.5-43.0 0.219 UG-383/U
X=2 43.0-50.0 0.188 UG-383/U
Available type of Rectangular waveguide is:
X=22 33-50 WR-22 UG-383/U
TRG719

Data for Gain and Beamwidth are typical for middle of frequency range

U band. 40-60 GHz

Part No Diameter of main reflector (mm) Gain dB,(typ) Beamwidth in deg. at 3dB level (typ) VSWR (typ)
ECA-U-X-100 100 32 3.9 1.35
ECA-U-X-200 200 38.2 2 1.3
ECA-U-X-300 300 41.7 1.3 1.25
ECA-U-X-450 450 44.8 0.9 1.25
ECA-U-X-600 600 46.4 0.7 1.25

Losses in a Protected cover is 0,7 dB (max)
Feed waveguide is circular or rectangular
Information for Ordering : X= Number for type of feed waveguide


Available types of Circular waveguides are:

Number Frequency Band (GHz) Diameter of Waveguide (inch) Flange
X=0 38.5-43.0 0.219 UG-383/U
X=1 43.0-50.0 0.188 UG-383/U
X=2 50.0-58.0 0.165 UG-383/U
Available type of Rectangular waveguide is:
X=19 40-60 WR-19 UG-383/U
TRG720

Data for Gain and Beamwidth are typical for middle of frequency range

V band. 50-75 GHz

Part No Diameter of main reflector (mm) Gain dB,(typ) Beamwidth in deg. at 3dB level (typ) VSWR (typ)
ECA-V-X-100 100 34 3.1 1.3
ECA-V-X-200 200 39.7 1.5 1.25
ECA-V-X-300 300 42.4 1 1.25
ECA-V-X-450 450 45.4 0.7 1.25
ECA-V-X-600 600 47.5 0.5 1.25

Losses in a Protected cover is 0,7 dB (max)
Feed waveguide is circular or rectangular
Information for Ordering : X= Number for type of feed waveguide

Available types of Circular waveguides are:

Number Frequency Band (GHz) Diameter of Waveguide (inch) Flange
X=0 50.0-58.0 0.165 UG-385/U
X=1 58.0-68.0 0.141 UG-385/U
X=2 68.0-77.0 0.125 UG-385/U
Available type of Rectangular waveguide is:
X=15 50-75 WR-15 UG-385/U

Data for Gain and Beamwidth are typical for middle of frequency range

E band. 60-90 GHz

Part No Diameter of main reflector (mm) Gain dB,(typ) Beamwidth in deg. at 3dB level (typ) VSWR (typ)
ECA-E-X-100 100 34.4 2.6 1.3
ECA-E-X-200 200 39.9 1.3 1.25
ECA-E-X-300 300 43.5 0.9 1.25
ECA-E-X-450 450 46.6 0.6 1.25

Losses in a Protected cover is 0,7 dB (max)
Feed waveguide is circular or rectangular
Information for Ordering : X= Number for type of feed waveguide

Available types of Circular waveguides are:

Number Frequency Band (GHz) Diameter of Waveguide (inch) Flange
X=1 68.0-77.0 0.125 UG-387/U
X=2 77.0-87.0 0.11 UG-387/U
X=3 87.0-100.0 0.094 UG-387/U
Available type of Rectangular waveguide is:
X=12 60-90 WR-12 UG-387/U

Data for Gain and Beamwidth are typical for middle of frequency range

W band. 75-110 GHz

Part No Diameter of main reflector (mm) Gain dB,(typ) Beamwidth in deg. at 3dB level (typ) VSWR (typ)
ECA-W-X-100 100 35.7 2.1 1.25
ECA-W-X-200 200 41.7 1 1.25
ECA-W-X-300 300 45 0.7 1.25
ECA-W-X-450 450 48 0.5 1.25
ECA-W-X-600 600 50 0.4 1.25

Losses in a Protected cover is 0,7 dB (max)
Feed waveguide is circular or rectangular
Information for Ordering : X= Number for type of feed waveguide


Available types of Circular waveguides are:

Number Frequency Band (GHz) Diameter of Waveguide (inch) Flange
X=0 77.0-87.0 0.11 UG-387/U-M
X=1 87.0-100.0 0.094 UG-387/U-M
X=2 100.0-112.0 0.082 UG-387/U-M
Available type of Rectangular waveguide is:
X=10 75-110 WR-10 UG-387/U-M

Data for Gain and Beamwidth are typical for middle of frequency range


F band. 90-140 GHz

Part No Diameter of main reflector (mm) Gain dB,(typ) Beamwidth in deg. at 3dB level (typ) VSWR (typ)
ECA-F-X-100 100 37 1.7 1.25
ECA-F-X-200 200 42.6 0.9 1.25
ECA-F-X-300 300 45.9 0.6 1.25
ECA-F-X-450 450 48 0.5 1.25

Losses in a Protected cover is 0,7 dB (max)
Feed waveguide is circular or rectangular
Information for Ordering : X= Number for type of feed waveguide

Available types of Circular waveguides are:

Number Frequency Band (GHz) Diameter of Waveguide (inch) Flange
X=0 87.0-100.0 0.094 UG-387/U-M
X=1 100.0-112.0 0.082 UG-387/U-M
X=2 112.0-125.0 0.075 UG-387/U-M
X=3 125.0-140.0 0.067 UG-387/U-M
Available type of Rectangular waveguide is:
X=8 90-140 WR-8 UG-387/U-M

Data for Gain and Beamwidth are typical for middle of frequency range

How to Order

Specify Model Number ECA-A-X-BBB
A- waveguide band
X - waveguide type
BBB – size of main reflector


Example:
To order antenna meets the following specification:

operation frequency 75-110GHz, in WR-10 waveguide band with 300mm of main reflector, should be ordered as
ECA -W-10-300

Delivery time 4-6 weeks for all models.
All ELVA-1 antennas are warranted for one year after receipt.