Virginia Diodes, Inc

Mixers

OVERVIEW

Description
VDI offers subharmonically-pumped mixers (SHM) and even-harmonic mixers (EHM) for a variety of applications between
50 GHz and 1700 GHz. These mixers use only planar and/or integrated diodes and provide state-of-the-art performance.

Subharmonic Mixers (SHM)

VDI SHMs ( LO = ½ RF frequency) have a waveguide LO input, are easy to use and ideally suited for mmWave & THz applications. These mixers can be used to up or down convert signals. The subharmonically-pumped mixers have a separate LO waveguide flange and typically exhibit > 100 dB isolation of the LO at the RF port.

Even Harmonic Mixers (EHM)

VDI EHMs are harmonic mixers that operate at an even harmonic multiple of the LO input. EHMs are shipped with an appropriate diplexer. Alternative harmonic mixing factors and customized diplexers are available upon request.

Fundamental Mixers (FM)

VDI offers Fundamental mixers (FMs) for frequency down-conversion. VDI FMs are single ended, meaning that the RF and LO signals are coupled to the mixer diode via the same waveguide flange. They offer excellent conversion loss performance. Higher frequency custom mixers may be available upon request.

Contact VDI today for additional information.

SHM

Subharmonic Mixers (SHM)
VDI Part #	RF (GHz)	LO (GHz)	Standard IF Option (GHz)	Extended IF Option (GHz)*	DSB Performance
VDI Part #	RF (GHz)	LO (GHz)	Standard IF Option (GHz)	Extended IF Option (GHz)*	Noise Temperature (K, typ.)^†	Conversion Loss (dB, typ.)^†
WR15SHM	50 - 75	25 - 37.5	<10	<14	400 - 800	<7
WR12SHM	60 - 90	30 - 45	<12	-	400 - 800	<7
WR10SHM	75 - 110	37.5 - 55	<15	<21	400 - 800	<7
WR8.0SHM	90 - 140	45 - 70	<19	<26	400 - 800	<7
WR6.5SHM	110 - 170	55 - 85	<24	<32	400 - 800	<7
WR5.1SHM	140 - 220	70 - 110	<31	<40	500 - 1000	<7.5
WR4.3SHM	170 - 260	85 - 130	<36	-	600 - 1200	<8
WR3.4SHM	220 - 330	110 - 165	<40	-	700 - 1400	<8.5
WR2.8SHM	260 - 400	130 - 200	<40	-	800 - 1500	<9
WR2.2SHM	330 - 500	165 - 250	<40	-	1000 - 2000	<9.5
WR1.9SHM	400 - 600	200 - 300	<40	-	1200 - 2500	<10
WR1.5SHM	500 - 750	250 - 375	<40	-	2000 - 5000	<11
WR1.2SHM	600 - 900	300 - 450	<40	-	7500 - 15000	<15
WR1.0SHM	750 - 1100	375 - 550	<40	-	7500 - 15000	<20
WR0.8SHM	900 - 1400	450 - 700	<40	-	10000 - 20000	<20

^†Performance specifications are typical with reduced performance at band edges.

^*Extended IF SHMs may require ~1 dB more LO input power than Standard SHMs for optimal performance.

Note: Additional Extended IF SHMs under development. Contact VDI for more information.

Results were achieved with optimal LO input power.

Contact VDI today for additional information.

EHM

Even Harmonic Mixers (EHM)
VDI Part #	RF (GHz)	Maximum Available LO Frequency (GHz)*	SSB Conversion Loss (dB)†	Harmonic
WR15EHM	50 - 75	10	~20 - 25	12
WR12EHM	60 - 90	12	~25 - 35	8
WR10EHM	75 - 110	15	~20 - 25	12
WR8.0EHM	90 - 140	19	~20 - 25	12
WR6.5EHM	110 - 170	24	~23 - 28	12
WR5.1EHM	140 - 220	31	~25 - 35	16
WR4.3EHM	170 - 260	36	~25 - 35	16
WR3.4EHM	220 - 330	40	~30 - 40	18
WR2.8EHM	260 - 400	40	~30 - 40	20
WR2.2EHM	330 - 500	40	~35 - 45	16

Notes:
*LO input frequency can be calculated by dividing the RF Input Frequency by the
desired harmonic number. LO frequency cannot exceed Maximum Available LO
Frequency specification. Alternative harmonic mixing factors are available.
†SSB Conversion Loss assumes optimal RF and LO power coupled into EHM.
Conversion Loss specification is for specified harmonic factor listed above.

Contact VDI today for additional information.

FM

Fundamental Mixers (FM)
VDI Part Number^††	RF / LO Frequency (GHz)	Maximum IF Frequency (GHz)*	RF / LO Flange	DSB Performance
VDI Part Number^††	RF / LO Frequency (GHz)	Maximum IF Frequency (GHz)*	RF / LO Flange	Conversion Loss (dB, typ.)**
WR15FM-XX	50 - 75	10	WR-15 UG-385/U	8
WR12FM-XX	60 - 90	12	WR-12 UG-387/U	8
WR10FM-XX	75 - 110	15	WR-10 UG-387/U-M	8
WR8.0FM-XX	90 - 140	19	WR-8.0 UG-387/U-M	8
WR6.5FM-XX	110 - 170	24	WR-6.5 UG-387/U-M	8
WR5.1FM-XX	140 - 220	31	WR-5.1 UG-387/U-M	9
WR4.3FM-XX	170 - 260	36	WR-4.3 UG-387/U-M	9
WR3.4FM-XX	220 - 330	40	WR-3.4 UG-387/U-M	10
WR2.8FM-XX	260 - 400	40	WR-2.8 UG-387/U-M	10
WR2.2FM-XX	330 - 500	40	WR-2.2 UG-387/U-M	11
WR1.9FM-XX	400 - 600	40	WR-1.9 UG-387/U-M	11
WR1.5FM-XX	500 - 750	40	WR-1.5 UG-387/U-M	15
WR1.2FM-XX	600 - 900	40	WR-1.2 UG-387/U-M	20
WR1.0FM-XX	750 - 1100	40	WR-1.0 UG-387/U-M	20
WR0.8FM-XX	900 - 1400	40	~25dBi Diagonal Horn	20
WR0.65FM-XX	1100 - 1700	40	WM-164 UG-387/U-M	20
WR0.34FM-XX	2300 - 3200	40	~25dBi Diagonal Horn	25

Notes:
*IF bandwidth may be limited by external components, such as the bias-tee and amplifier.
**VDI does not test conversion loss. For mixers up to WR-1.0 and including WR0.65, VDI provides responsivity (monitor voltage / RF input power) data for each unit. For higher frequency FMs (WR0.8 and WR0.34), only I-V test and visual inspection will be completed prior
to shipment. Additional testing may be available upon request at additional cost. Contact VDI for more information.
^††XX is 06, 20 or 40, depending on the configuration. The 06, 20 and 40 options include a 6, 20 or 40 GHz Bias-Tee and Amplifier respectively, attached external to the FM housing. Contact VDI for costs to upgrade to 20 GHz or 40 GHz options.

IQ Mixer

VDI offers a ~118 - 155 GHz Subhharmonically Pumped IQ mixer with low conversion loss and high IF bandwidth. By adding an IF 90 degree hybrid, the mixer can be used as an image reject mixer or a single sideband up-converter.

IQmixerimage

VDI WR6.5IQSHM IQ Subharmonically Pumped Mixer
Parameter	Specification
RF Port	~118 - 155 GHz [WR-6.5 UG-387/U-M]
LO Input	~59 - 77 GHz [WR-13 UG-387/U-M]
IF Port	DC - 24 GHz [2.9mm(f)]
LO Power (Optimal / Damage)	+12 to +16 dBm / +18 dBm
RF Input Power (~P0.1dB / Damage)	-11 dBm / +6 dBm
Typical Conversion Loss	~14 dB (SSB) I and Q*

*Includes loss of RF Hybrid

Contact VDI for more information on the WR6.5IQSHM or for other IQ Mixer solutions. Custom IQ Mixer solutions may be available upon request.