Cassegrain Antennas

26.5-140 GHz for OEM market

Features
High gain High efficiencyWide band operation Low VSWR
Applications
PtP and PMP radio links Radars RadioAstronomy
Description 
ELVA-1 has developed a low cost high performance millimeter wave Cassegrain 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 26.5 to 140 GHz with reflector diameters ranging from 100 to 600 mm. The gain is up to 53 dBi depending on the frequency. The main reflector has a highly accurate surface and is made of 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 18 dB). 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.

Specifications

for Cassegrain antenna ECA – XX series

Ka band. 26,5-40 GHz

Part NoDiameter of main reflector (mm)Gain
dB (typ)
Beam width at 3dB level  deg. (typ)VSWR
(typ)
ECA-Ka-X-10010026.36.01.40
ECA-Ka-X-20020032.72.91.35
ECA-Ka-X-30030036.42.01.25
ECA-Ka-X-45045040.91.31.25
ECA-Ka-X-60060042.90.91.25

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:

NumberFrequency Band (GHz)Diameter of Waveguide (inch)Flange
X=026.0-28.50.328UG-381/U
X=128.5-33.00.281UG-381/U
X=233.0-38.50.250UG-381/U
X=338.5-43.00.219UG-381/U

Available type of Rectangular waveguide is:

X=2826.5-40WR-28UG-599/U UG-381/U UG-600

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

Q band. 33-50 GHz

Part NoDiameter of main reflector (mm)Gain, dB (typ)Beam width at 3 dB level  deg (typ)VSWR
(typ)
ECA-Q-X-10010028.34.81.40
ECA-Q-X-20020034.62.31.35
ECA-Q-X-30030038.51.61.25
ECA-Q-X-45045042.91.01.25
ECA-Q-X-60060044.90.71.25

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:

NumberFrequency Band (GHz)Diameter of Waveguide (inch)Flange
X=033.0-38.50.250UG-383/U
X=138.5-43.00.219UG-383/U
X=243.0-50.00.188UG-383/U

Available type of Rectangular waveguide is:

X=2233-50WR-22UG-383/U TRG719

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

U band. 40-60 GHz

Part NoDiameter of main reflector (mm)Gain,
dB (typ)
Beam width at 3dB level deg (typ)VSWR
(typ)
ECA-U-X-10010032.03.91.35
ECA-U-X-20020038.22.01.30
ECA-U-X-30030041.71.31.25
ECA-U-X-45045044.80.91.25
ECA-U-X-60060046.40.71.25

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:

NumberFrequency Band (GHz)Diameter of Waveguide (inch)Flange
X=038.5-43.00.219UG-383/U
X=143.0-50.00.188UG-383/U
X=250.0-58.00.165UG-383/U

Available type of Rectangular waveguide is:

X=1940-60WR-19UG-383/U TRG720

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

V band. 50-75 GHz 

Part NoDiameter of main reflector (mm)Gain,
dB (typ)
Beam width at 3dB level  deg (typ)VSWR
(typ)
ECA-V-X-10010034.03.11.3
ECA-V-X-20020039.71.51.25
ECA-V-X-30030042.41.01.25
ECA-V-X-45045045.40.71.25
ECA-V-X-60060047.50.51.25

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:

NumberFrequency Band (GHz)Diameter of Waveguide (inch)Flange
X=050.0-58.00.165UG-385/U
X=158.0-68.00.141UG-385/U
X=268.0-77.00.125UG-385/U

Available type of Rectangular waveguide is:

X=1550-75WR-15UG-385/U

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

E band. 60-90 GHz

Part NoDiameter of main reflector (mm)Gain,
dB (typ)
Beam width at 3dB level deg (typ)VSWR
(typ)
ECA-E-X-10010034.42.61.30
ECA-E-X-20020039.91.31.25
ECA-E-X-30030043.50.91.25
ECA-E-X-45045046.60.61.25
ECA-E-X-60060049.50.41.25

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:

NumberFrequency Band (GHz)Diameter of Waveguide (inch)Flange
X=168.0-77.00.125UG-387/U
X=277.0-87.00.110UG-387/U
X=387.0-100.00.094UG-387/U

Available type of Rectangular waveguide is:

X=1260-90WR-12UG-387/U

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

W band. 75-110 GHz

Part NoDiameter of main reflector (mm)Gain, dB (typ)Beam width at 3dB level deg (typ)VSWR
(typ)
ECA-W-X-10010035.72.11.25
ECA-W-X-20020041.71.01.25
ECA-W-X-30030045.00.71.25
ECA-W-X-45045048.00.51.25
ECA-W-X-60060050.00.41.25

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:

NumberFrequency Band (GHz)Diameter of Waveguide (inch)Flange
X=077.0-87.00.110UG-387/U-M
X=187.0-100.00.094UG-387/U-M
X=2100.0-112.00.082UG-387/U-M

Available type of Rectangular waveguide is:

X=1075-110WR-10UG-387/U-M

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

F band. 90-140 GHz

Part NoDiameter of main reflector (mm)Gain
dB (typ)
Beam width at 3dB level deg (typ)VSWR
(typ)
ECA-F-X-10010037.01.71.25
ECA-F-X-20020042.60.91.25
ECA-F-X-30030045.90.61.25
ECA-F-X-45045048.00.51.25

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:

NumberFrequency Band (GHz)Diameter of Waveguide (inch)Flange
X=087.0-100.00.094UG-387/U-M
X=1100.0-112.00.082UG-387/U-M
X=2112.0-125.00.075UG-387/U-M
X=3125.0-140.00.067UG-387/U-M

Available type of Rectangular waveguide is:

X=890-140WR-8UG-387/U-M

Data for Gain and Bandwidth 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 in mm

Example

To order antenna meets the following specification: operation frequency 75-110 GHz, in WR-10 waveguide band with UG-387/U-M flange and 300mm of main reflector, should be ordered as ECA-W-10-300

All ELVA-1 antennas are warranted for one year after receipt.