VHF Field Day 2012
QRV on Microwave
How to build a modern
Microwave Station
61. UKW Tagung Weinheim 2016
16-09-09
© OZ1FF 2016
1
CV OZ1FF
1962:
1964:
1964:
1965:
1969:
1977:
1998:
2000:
2001:
2001:
2002:
2004:
2007:
2009:
2012:
2013:
16-09-09
Licenced as OZ9KY, QRV 2 m
Licenced as OZ1FF
QRV 70 cm
QRV 23 cm
Licenced as DJ0XB
QRT
QRV 2 m+70 cm
QRV 23+3 cm
Member of OZ1ALS VUSHF Contest Team
QRV 13 cm
Member of EDR’s VHF-committee
QRV 1,2 cm
QRV 6 cm
QRV 3 cm EME
QRV 1,2 cm EME
QRV 6 mm
© OZ1FF 2016
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Microwave Bands
Frequencies above 1.000 MHz = 1 GHz
 Possible bands/wavelengths

• 1240 - 1300 MHz = 23 cm
• 2300 - 2450 MHz = 13 cm
• 3400 - 3410 MHz = 9 cm
• 5650 - 5850 MHz = 6 cm
• 10000 - 10500 MHz = 3 cm
• 24000 - 24250 MHz = 1,2 cm
• +47/76/122/134/241 GHz
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© OZ1FF 2016
1296 MHz
2320 MHz
3400 MHz
5760 MHz
10368 MHz
24048 MHz
3
Microwave Station

Main components
• Base band radio
• Transverter
• Low Noise Amplifier
• Power Amplifier
• Antenna Switch
• Antenna
• Computers/Internet
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Past
Early microwavers used to build their
stations from component level
 They used plenty of time building
 Had to wait for fine weather to go
portable for obtaing a few LOS
contacts
 Some people still do it this way
 But today there is a easier solution:

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Playing with Building Bricks
Children and grandchildren do it
 Even Hams do it


Thanks to DB6NT and many others for
making building bricks for microwave
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Present
System design instead of radio
design
 Microwave part is build up from
transverter modules, oscillators, low
noise preamplifiers, power amplifiers
and antennas
 Base band radio is a commercial HFtransceiver
 Fixed operation rather than portable

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Important Characteristics
Microwave signals are mostly at the
grass-root level
 High RX sensitivity = ”long ears”

High frequency accuracy and stability
 High dynamic range

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Important Characteristics

Transmitter
• Tube amplifiers
• TWT
• High voltage
• SSPA
• Surplus
• DB6NT, DG0VE, DL2AM

QRO can be dangerous and is not
always necessary
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Important Characteristics

TX power
• 23 & 13 cm 50 W is fine for AR
• 3 cm 200 mW OK for TR, 2 W and more
is fine for RS
• EME needs more power
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High RX Sensitivity
Use the best LNA direct at the
antenna
 Fight losses in front of LNA

• Low VSWR
• Cables, connectors and relays/switches

Select system gain for lowest NF and
good dynamic properties
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Cascading Noisy Amplifiers
High gain minimizes system NF but can lead
to overload of base band radio!
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Transverters

DB6NT
• Kits or ready build
DEMI
 DG0VE
 I3OPW

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Basic Transverter Principle
If 28 MHz IF additional
TX filter is mandatory
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Frequency accuracy and
stability

Lock oscillators
• Rb or GPSDO reference

Oscillator phase noise
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OZ5N One Size Fits All PLL
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FE-5680A Rb Std.
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Efratom LPRO-101 Rb Std.
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G3RUH GPSDO
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Base Band Radio
HF-transceiver 28 – 30 MHz
 Frequency stability and accuracy
 Transverter 144/432<>28 MHz
 Interfacing

• Transverter RF
• Transverter switching
• Supporting software – Spectran, WSJT
etc.

Best choise is >>>>>>>
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© OZ1FF 2016
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Software Defined Radio
Spectrum and waterfall display
 Excellent filters
 High dynamic range
 Easy transverter control
 Cable free interfacing to supporting
software using VAC and VSP
 Best solution today is Hermes/Anan or
Flex-6XXX

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© OZ1FF 2016
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Hermes SDR
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Hermes SDR
8 layer gold plated PCB 12 x 16 cm
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SDR Advantage
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Rain Scatter
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RS Activity
DL6NAA Direct path
PA0BAT Side scatter
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Noisy 10 GHz Beacon
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”Clean” 10 GHz Beacon
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Radar Noise
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Station OZ1FF
Build and optimized since 1998
Band
XVTR
PreAmp
PA
Antenna
23cm
MKU13G2
LNA131AH-HEMT
145 W 1,5m dish
13cm
MKU144G2/MKU23G2
LNA231AH-HEMT
250 W 1,5m dish
6cm
MKU144G2/MKU57G2
N/A
3cm
MKU144G2/MKU10G3
LNA101AS-HEMT
1,2cm
MKU432G2/MKU24GA
MKU243RX2
7 W 1,5m dish
12/50 W 65/240 cm dish
2/10 W 65/240 cm dish
28 – 30 MHz Base Band Radio: Hermes
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144/28 XVTR
432/28 XVTR
22m AIRCOM+ 6cm/3cm <> 2m & 1,2cm <>70cm
LAN
USB
Tranverter
Switch
65 cm
offset dish
Intel NUC i5
2,6 GHz/8 GB
WIN10/64
PowerSDR
VSP/VAC
3/1,2cm XVTR
LNA/12W/2W
W1GHZ dual
band feed
1,5 m dish
23/13/6cm
ringfeed
OZ1FF Microwave Station
Control
Hermes
Microphone
Key
23 cm
Transverter
150 W PA
22 m 7/8” CF
27V 1500W PS
Headset
G3RUH
10 MHz
GPSdisciplined
OCXO
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23 cm LNA
X-FER relay
6cm
XVTR
7W
13 cm
Transverter
250 W PA
© OZ1FF 2016
18 tower
28 MHz <>XVTRCOM
13 cm LNA
X-FER relay
22m 7/8” HX
31
Antennas



QTH JO45BO58 5 mASL
18 m tower
1,5 m dish
• RF HamDesign kit
• Ringfeed 23/13/6 cm

65 cm dish
• Modified TV-SAT dish
• Chapparel feed 3/1,2 cm
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Ringfeeds 1,3 – 10 GHz
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Tower Box
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10/24 GHz XVTR Box
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EME 10 GHz
2,4 m offset dish
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Feed horn/WGS/preamp
© OZ1FF 2016
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EME 10 GHz
Transverter
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Echo
© OZ1FF 2016
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EME 24 GHz
Transverter
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W5LUA Echo Test
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OZ1FF Echo Test
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OZ1FF @ W5LUA
W5LUA using automatic Doppler correction
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OZ1FF 1270 Hz Sync. tone
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OZ1FF @ W5LUA
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W5LUA @ OZ1FF
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W5LUA 73
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© OZ1FF 2016
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Any Questions?
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© OZ1FF 2016
46
How About This?
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© OZ1FF 2016
47
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