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R&S®ADDx Multichannel DF Antennas
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R&S®ADDx Multichannel DF Antennas - 1

P  roduct Brochure | Version 10.00 R&S®ADDx Multichannel DF Antennas Product overview

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R&S®ADDx Multichannel DF Antennas - 3

R&S®ADDx Multichannel DF Antennas At a glance The R&S®ADDx DF antennas are decisive for the high efficiency of the Rohde & Schwarz multichannel direction finders because they offer unique technical innovations. The wide product range ­ overs c stationary, transportable and mobile applications. In development, the focus was on the lightning protection concept of the antennas and their immunity to harsh ambient conditions. Due to the large number of antenna elements, the R&S®ADDx DF antennas offer high direction-finding accuracy and sensitivity, as well as outstanding immunity to reflections....

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R&S®ADDx Multichannel DF Antennas - 4

Model overview R&S®ADDx multichannel DF antennas R&S®ADD078SR UHF/SHF SR DF antenna Frequency range from 1.3 GHz to 6 GHz Frequency range from 300 kHz to 30 MHz ▷▷ page 6 Frequency range from 300 kHz to 30 MHz ▷▷ page 7 R&S®ADD011SRX super-resolution N-channel HF DF antenna Frequency range from 300 kHz to 30 MHz ▷▷ page 7 Frequency range from 20 MHz to 450 MHz ▷▷ page 7 R&S®ADD153SR super-resolution VHF/UHF DF antenna Frequency range from 20 MHz to 1.3 GHz ▷▷ page 8

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R&S®ADDx multichannel DF antennas R&S®ADD157 dual polarized VHF/UHF DF antenna Frequency range from 20 MHz to 1.3 GHz (vertical)/ frequency range from 40 MHz to 1.3 GHz (horizontal) ▷▷ page 9 Frequency range from 1.3 GHz to 3 GHz ▷▷ page 8 Frequency range from 300 kHz to 30 MHz ▷▷ page 9 portable R&S®ADD253 VHF/UHF broadband DF antenna Frequency range from 20 MHz to 3 GHz ▷▷ page 9 R&S®ADD216 compact LF UHF DF antenna mobile R&S®ADD015 centric mast HF DF antenna Frequency range from 1 MHz to 30 MHz ▷▷ page 10 Frequency range from 300 kHz to 3 GHz Rohde & Schwarz R&S®ADDx Multichannel

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R&S®ADDx Multichannel DF Antennas - 6

❙❙ Mobile and stationary DF antenna for the frequency range from 1.3 GHz to 6 GHz ❙❙ Multi-element DF antenna with two circular antenna arrays arranged on top of each other; each array contains eight elements ❙❙ DF measurements up to ITU class A DF accuracy ❙❙ Ready for the super-resolution DF method ❙❙ Ready for installation of an additional DF antenna on top ❙❙ For installation on a mast by means of an R&S®ADD07XZB mast adapter or for use on an R&S®ADD1XTP tripod ❙❙ Mobile DF antenna for the frequency range from 300 kHz to 30 MHz ❙❙ Suitable for ground waves and low-angle sky waves ❙❙ DF...

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❙❙ Stationary and transportable DF antenna for the frequency range from 300 kHz to 30 MHz ❙❙ Suitable for ground waves and sky waves ❙❙ Multi-element DF antenna with 9/18 antenna elements ❙❙ DF measurements up to ITU class A DF accuracy ❙❙ Available in different diameters (50 m, 100 m and 150 m) ❙❙ Model with 18 antenna elements in two concentric DF circles for especially high DF sensitivity and accuracy ❙❙ Measurement of elevation enabling single station location (SSL) (optional) ❙❙ Ready for the super-resolution DF method ❙❙ Antenna elements with active/passive switchover for adaptation...

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R&S®ADD153SR ❙❙ Mobile and stationary DF antenna for the frequency range from 20 MHz to 1.3 GHz ❙❙ Multi-element DF antenna with nine antenna elements ❙❙ DF measurements up to ITU class A DF accuracy ❙❙ Antenna elements with variable electrical length for optimal adaptation to the receive frequency ❙❙ Ready for the super-resolution DF method ❙❙ Antenna elements with active/passive switchover for adaptation to the signal environment ❙❙ Integrated, extendible lightning protection concept with lightning rod; no impact on DF accuracy ❙❙ R&S®ADD-LP extended lightning protection (option) ❙❙ For...

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❙❙ Mobile and stationary DF antenna for the frequency range from 20 MHz to 1.3 GHz (vertical polarization) or from 40 MHz to 1.3 GHz (horizontal polarization) ❙❙ Switchable between horizontal and vertical polarization ❙❙ Multi-element DF antenna with nine antenna elements each for vertical and horizontal polarization ❙❙ DF measurements up to ITU class A DF accuracy ❙❙ Antenna elements with variable electrical length for optimal adaptation to the receive frequency (vertical polarization) ❙❙ Antenna elements with active/passive switchover for adaptation (vertical and horizontal polarization)...

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R&S®ADD216 ❙❙ Mobile broadband DF antenna for the frequency range from 300 kHz to 3 GHz ❙❙ Highly integrated antenna system with unique DF sensitivity and accuracy ❙❙ Especially suitable for use on board ships ❙❙ Multi-element DF antenna for VHF/UHF (with eight antenna elements each) and additional reference antennas ❙❙ Two independent omnidirectional reception antennas for the HF and VHF/UHF ranges already integrated for connecting separate receivers ❙❙ Protected against overvoltage caused by nearby lightning strikes R&S®ADD015 ❙❙ Mobile and stationary DF antenna for the frequency range...

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R&S®ADD253 VHF/UHF broadband DF antenna. Rohde & Schwarz R&S®ADDx Multichannel DF Antennas 11

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Superior immunity to reflections Due to multipath propagation (especially in metropolitan areas), not only the direct wave but also reflections arrive at the DF antenna. The R&S®ADDx multichannel DF antennas offer (due to their design) a higher immunity to such reflections than most other commercially available antennas, since they feature an exceptionally large number of antenna elements. Virtually all R&S®ADDx DF antennas comprise nine antenna elements for the HF/VHF/UHF range, and eight for the UHF range. Commercially available DF antennas typically have only five. The R&S®ADDx (except...

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R&S®ADDx Multichannel DF Antennas - 13

wave field would produce are calculated one after the other, the field strength of the direct wave being twice as high as that of the reflection. Since the DF error depends on the frequency, the angle of incidence and the phase angle of the reflection, all combinations are simulated. Then the RMS value is determined based on the detected individual errors. As the table below shows, DF antennas with nine elements provide a considerably higher DF accuracy than commercially available five-element DF antennas. It is assumed that the five-element DF antennas exhibit a system DF accuracy of 1°...

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