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NLTL-6275U-SW
GaAs MMIC Non-Linear Transmission Line
NLTL-6275 is a MMIC non-linear transmission line (NLTL) based comb generator. This NLTL offers excellent phase noise performance over a 3 to 15 GHz input frequency range with output tones beyond 85 GHz. NLTL-6275 is fabricated with GaAs Schottky diode based varactors on a 2.28 mm x 3.13 mm substrate. Both wire bondable die and connectorized modules are available.
| Parameter | Typ | Unit |
|---|---|---|
| Input Power | 17 to 26 | dBm |
| Output Frequency Range | 3 to 85 | GHz |
| Input Frequency Range | 3 to 15 | GHz |
Summary only – refer to the Electrical Specifications, Absolute Maximum Ratings, and Recommended Operating Range tables for complete details.
| Part Number | Description | Package | Connectors | Green Status | Product Lifecycle | Export Classification |
|---|---|---|---|---|---|---|
| NLTL-6275U-SW | GaAs MMIC Non-Linear Transmission Line | U | Standard | RoHS REACH | Released | EAR99 |
| NLTL-6275U | GaAs MMIC Non-Linear Transmission Line | U | Standard | RoHS REACH | Released | EAR99 |
The electrical specifications apply at TA=+25°C in a 50Ω system. Typical data shown is for the NLTL used in the forward direction with a sine wave input. Min and Max limits apply only to our connectorized units and are guaranteed at TA=+25°C. All bare die are 100% DC tested and visually inspected.
| Parameter | Test Conditions | Minimum Frequency (GHz) | Maximum Frequency (GHz) | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|---|
| Input Frequency Range | - | - | - | 3 | - | 15 | GHz |
| Input Power | - | - | - | 17 | - | 26 | dBm |
| Maximum Output Harmonic for given Input 1 | 10 GHz Input | - | - | - | - | 8 | - |
| Maximum Output Harmonic for given Input | 15 GHz Input | - | - | - | - | 5 | - |
| Maximum Output Harmonic for given Input 2 | 3 GHz Input | - | - | - | - | 28 | - |
| Maximum Output Harmonic for given Input 3 | 5 GHz Input | - | - | - | - | 16 | - |
| Maximum Output Harmonic for given Input 4 | 7 GHz Input | - | - | - | - | 12 | - |
| Output Frequency Range | - | - | - | 3 | - | 85 | GHz |
[1][2][3][4] Maximum Output Harmonic specification given for the harmonic with a -20 dBm output power for a +20 dBm input.
The Recommended Operating Conditions indicate the limits, inside which the device should be operated, to guarantee the performance given in Electrical Specifications Operating outside these limits may not necessarily cause damage to the device, but the performance may degrade outside the limits of the electrical specifications. For limits, above which damage may occur, see Absolute Maximum Ratings.
| Parameter | Min | Nominal | Max | Unit |
|---|---|---|---|---|
| Ambient Temperature | -55 | 25 | 100 | °C |
| Input Power | 16 | - | 26 | dBm |
The Absolute Maximum Ratings indicate limits beyond which damage may occur to the device. If these limits are exceeded, the device may be inoperable or have a reduced lifetime.
| Parameter | Maximum Rating | Unit |
|---|---|---|
| Maximum Operating Temperature | 100 | °C |
| Maximum Storage Temperature | 125 | °C |
| Minimum Operating Temperature | -55 | °C |
| Minimum Storage Temperature | -65 | °C |
| Parameter | Details | Rating |
|---|---|---|
| Weight | Package name: U | 10g |
| Dimensions | - | 14.22 x 13.21 mm |
The NLTL should only be used in the forward direction, with the input and output ports given in Port Functions.
| Port | Function | Connector Type | Description | DC Equivalent Circuit |
|---|---|---|---|---|
| GND | Ground | - | U package ground provided through metal housing and outer coax conductor. |  |
| Port 1 | Input | SMAF | Input 1x Frequency Port. Port 1 is diode connected for the CH package and DC short for the U package. |  |
| Port 2 | Output | 1.0F | 2x Input Frequency output port. Port 2 is diode connected for the CH and DC open for the U package. |  |
NLTL-6275 belongs to Marki Microwave’s NLTL family of multipliers and non-linear transmission lines. The NLTL product line consists of passive GaAs MMIC non-linear transmission lines designed and fabricated with GaAs Schottky diode based varactors. NLTLs take an input signal and create an impulse train of harmonics. Harmonic outputs up to and beyond 85 GHz are generated by the NLTL.
Port 1 supports S, C, and X band input signals. Port 2 will output integer multiples of the input signal (i.e., x2, x3, x4, …, x28) up to the 28th output harmonic or a maximum of 85 GHz for a typical -20 dBm output power. Higher harmonics can be generated but will be at a lower efficiency.
The operating conditions of the NLTL are extremely important to optimize performance. High power inputs will increase the output power observed; however, the conversion efficiency will decrease. This is increasingly true for higher input frequencies and at input powers above the recommended limit.
NLTL-6275 requires no external DC bias. The self-bias of the diodes caused by the rectified RF input signal is sufficient for operation. For the best performance, optimization of the DC return path is recommended for each specific application to optimize the harmonic output power distribution.
The phase noise of a non-linear transmission line is outstanding. If verification of performance is necessary, the application circuit used and input conditions are extremely important. NLTLs are AM sensitive. If there is excessive AM noise on the input of the NLTL, observing the output of the NLTL will show excessive PM/phase noise because of the high AM to PM conversion property of NLTLs.
DC Path to Ground — An RF choke followed by a 15 Ω resistor should be used to provide a DC path to ground on the input port of the NLTL. A shunt 1 μF capacitor is used to filter noise generated by the resistor. This forms the circuit which self-biases the NLTL. The DC return to ground removes DC rectified current created by high power RF signal injection. The DC path to ground is provided within the S package. A conical coil inductor is recommended to push the self-resonance frequency of the inductor past the operating bandwidth of the NLTL. The recommended inductance value of the conical coil inductor is 50nH or higher.
Blocking Capacitor — A DC blocking capacitor on the output of the NLTL-6275’s integrated circuit is necessary to prevent unwanted DC current flow from or to the output. If there is a DC signal on the input, place a DC block on the input to avoid disrupting the self-biasing of the diodes.
Download : Outline 2D Drawing Outline 3D Drawing Outline 3D STP
| Revision Code | Revision Date | Comment |
|---|---|---|
| - | 2017-09-01 | Datasheet Initial Release |
| A | 2017-10-01 | Corrected typos |
| B | 2017-12-01 | Added U package outline |
| C | 2018-09-01 | Corrected Signal Pad Locations |
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