Balanced Mixer/Frequency Converters


	Balanced Mixer / Frequency Converters

RF and LO 10-100 GHz	Conversion loss as low as 4dB
IF DC to 20 GHz	25 dB LO/RF isolation
LO power 10 mW, 1mW with bias	50 Ohms IF output impedance
Singly or doubly balanced	SSB modulation or image rejection

Downconverters: Moderate Bandwidth

Downconverters: Broad Bandwidth

High-Level Upconverters / SSB Modulators


	The units described here are either standard Spacek Labs products or they are a small sample of many special designs produced to specific customer requirements.


	Basically, the frequency converters are divided into low power downconverters or high power upconverters.

For downconverters we recommend singly-balanced configuration optimized over specified frequencies. Such a customized mixer might be actually less expensive, yet performs better over the relatively narrow specified frequency range than the standard wide bandwidth units. For the lowest possible noise, liquid nitrogen cooled mixers are available, which give a DSB noise figure of about 1.0dB at Ka-Band.


	For high-level upconverters the configuration is either singly-balanced configuration with a pair of high-barrier diodes, or doubly-balanced with 2 pairs of standard diodes.


	DOWNCONVERTERS: MODERATE BANDWIDTH

Band

Model Number

RF Input (GHz)

LO Input (GHz)

IF Output (GHz)

Max SSB Conversion Loss (dB)

75-110 GHz

M89-1

M94-1

M94-10

M85-11

88-90

93-40

93-95

84-86

88-90

93-94

84

74

DC-1

DC-1

9-11

10-12

5.0

5.0

7.0

7.0

50-75 GHz

M60-1

M53-8

M58-9

59-61

50-56

56-60

59-61

40-60

42-60

DC-2

DC-16

DC-18

5.0

7.0

7.5

40-60 GHz

M42-1

M42-7

M44-7

40-44

40-44

42-46

40-44

33-50

40-60

DC-4

DC-11

DC-14

4.5

6.0

6.5

33-50 GHz

M40-7

M43-4

M44-MS

M44.5-MS

40-41

43-43.5

43.5-45.5

43.5-45.5

33.0

39.3

37.4

9.0-9.5*

7-8

3.7-4.2

6.1-8.1

6.6-6.9

5.5

3.2***

6.5

6.0

26-40 GHz

M28.5

M32.5

M37-6

26-30

30-34

34-40

26-40

26-44

34-52

DC-10

DC-10

DC-12

5.0

5.0

5.5

18-26.5 GHz

M20-4

M24-4

MM23-9.7**

18-22

22-26

21.5-24.5

18-26

18-26

12-15

DC-8

DC-8

9.2-10.2

5.0

5.0

7.0


	Internal 4X LO multiplier Doubly-balanced **LN cooled


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	DOWNCONVERTERS: BROAD BANDWIDTH

Band

75-110 GHz

50-75 GHz

40-60 GHz

33-50 GHz

26-40 GHz

18-40 GHz

18-26 GHz

Model No.	RF Input (GHz)	LO Input (GHz)	IF Output (GHz)	Max SSB Conversion Loss (dB)
MW-U	75-110	75-110	DC-3	9.0
M90-U	85-95	85-95	DC-3	7.0
M95-U	90-100	90-100	DC-3	7.0
M94-5(3X)*	91-97	29.66	2-8	8.0
MV-U	50-75	50-75	DC-2	7.0
M60-15	55-65	40-50	15	5.5
MUU-1	40-60	40-60	DC-2	7.5
MUU-11	40-60	40-60	DC-20	9.5
MUQ-11	40-60	33-50	DC-18	7.0
MQQ-1	33-50	33-50	DC-2	7.0
MQQ-11	33-50	33-50	DC-17	8.5
MQU-11	33-50	40-60	DC-22	9.0
MKaKa-1	26.5-40	26.5-40	DC-2	6.0
MKaKa-9	26.5-40	26.5-40	DC-14	7.5
MKaQ-10	26.5-40	33-50	DC-20	8.0
M180-U	18-40	18-40	DC-14	8.0
M180Q-9	18-40	18-40	DC-14	8.0
M180Ka-9	18-40	33-50	DC-18	7.5
MKK-1	18-26.5	18-26.5	DC-1	6.0
MKK-6	18-26.5	18-26.5	DC-8.5	7.0
MKKa-7	18.26.5	26-40	DC-14	7.0


	* Internal LO tripler


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	HIGH LEVEL UPCONVERTERS / SSB MODULATORS

Up to 20mW output power

20 to 40dB undesired sideband suppression

Although downconverters can also be used as upconverters, for applications requiring either high output power or single-sideband output the upconverters described below were developed. These units are either single-balanced mixers with integrated output filter to suppress the undesired sideband, or they are doubly-balanced SSB modulators with integrated hybrids in which the undesired sideband is suppressed by phasing.

Output Band

40-60 GHz

26-40 GHz

18-26 GHz

Model No.	IF Input Frequency (GHz)	IF Input Power (GHz)	LO Input Frequency (GHz)	LO Input Power (mW)	RF Output Frequency (GHz)	RF Output Power (mW) 1dB comp.
MM2-60*	2	11	58	30	60	4
MM4-50*	3-4	60	46	100	49-50	5
M1-51	1	40	51.6	60	50.6 & 52.6	10**
M2-47	1-2	15	45.6	40	46.6-47.6	3
M7-43	5-8	8	37	20	42-45	2
M12-42	12	20	30	40	42	5
M6.9-MS	6.4-7.4	20	9.3-9.5***	100	43.5-45.5	3
M1-37	DC-1	25	36.6	50	36-38	10**
M2-33	1-2	12	31.2	35	32.2-33.2	3
M3-35	3	50	31	60	32 & 38	20**
MM7-38*	6.8	50	31	60	37-39	12
M2-22	1.3	100	20.9	75	19.6-20.5	5
M4-21	4-5	20	15.5	35	19.5-20.5	5


	* Doubly-balanced SSB modulator DSB output *Internal LO quadrupler


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