Device Overview

General Description

The HLM-20PSM is a high-power GaAs Schottky diode signal limiter featuring high IP3 over a broad DC-20GHz bandwidth. It offers low insertion loss and excellent return loss from DC through K band and has a typical 1 dB compression point of 15 dBm. Its high power handling makes it ideal for protecting sensitive components and for applications requiring high linearity. It is available as a plastic surface mount or as a connectorized evaluation board.

Photo of HLM-20PSM

Features

  • Low 0.7dB loss at 10 GHz
  • 50W Peak Power (pulsed), 5W CW
  • +13 to +17 dBm Flat Leakage @ 1W CW
  • Typical P1dB of +15dBm
  • Small signal S2P data available

Applications

  • RF Transceivers
  • Test and Measurement Equipment
  • SATCOM

Functional Block Diagram

Block Diagram

Part Ordering Options

Part NumberDescriptionPackagePacking SizeGreen StatusProduct LifecycleExport Classification
HLM-20PSMHigh Power DC - 20GHz LimiterQFN-

REACH

RoHS

ReleasedEAR99
EVAL-HLM-20PEvaluation Board, High Power DC - 20GHz LimiterEVAL-

REACH

RoHS

ReleasedEAR99
HLM-20P-TRTape and Reel, High Power DC - 20GHz LimiterQFN7"

REACH

RoHS

ReleasedEAR99

Table Of Contents

Revision History

Revision CodeRevision DateComment
A2025-12-05ESD Updated

Rev: A | Copyright © 2025 Marki Microwave LLC.

2

Specifications

Absolute Maximum Ratings

ParameterMaximum RatingUnit
Maximum Operating Temperature 100°C
Maximum Storage Temperature 125°C
Minimum Operating Temperature -55°C
Minimum Storage Temperature -65°C
RF Power Handling , Average 5W
RF Power Handling , Peak 50W

Package Information

ParameterDetailsRating
ESD250 to < 500 VoltsHBM Class 1A
WeightPackage name: QFN0.041g
Dimensions-4 x 4 mm
Moisture Sensitivity Level-MSL 1

Rev: A | Copyright © 2025 Marki Microwave LLC.

3

Electrical Specifications

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
Flat Leakage -1 1-17-dBm
Flat Leakage -20 20-13-dBm
Input P1dB -0 20-15-dBm
Insertion Loss -0 20-0.51.5dB
Return Loss -0 20-15-dB

Rev: A | Copyright © 2025 Marki Microwave LLC.

4

Typical Performance Plots

Insertion Loss (dB) graph for HLM-20PSM
Return Loss graph for HLM-20PSM
P1dB graph for HLM-20PSM
P0.1dB Compression Point (dBm) graph for HLM-20PSM
Output Power vs Input Power graph for HLM-20PSM
Insertion Loss, Output Power vs. Input Power @ 1 GHz graph for HLM-20PSM
Insertion Loss, Output Power vs. Input Power @ 25GHz graph for HLM-20PSM
Insertion Loss, Output Power vs. Input Power @ 10 GHz graph for HLM-20PSM

Rev: A | Copyright © 2025 Marki Microwave LLC.

5

Insertion Loss, Output Power vs. Input Power @ 15 GHz graph for HLM-20PSM
Insertion Loss, Output Power vs. Input Power @ 20 GHz graph for HLM-20PSM
Harmonic Suppression vs. Frequency @ +5 dBm Input (dBc) graph for HLM-20PSM
Harmonic Suppression vs. Input Power @ 1 GHz (dBc) graph for HLM-20PSM
3F Harmonic Output Power vs. Frequency (dBm) graph for HLM-20PSM
5F Harmonic Output Power vs. Frequency (dBm) graph for HLM-20PSM
Input IP3 (dBm) graph for HLM-20PSM
IIP2(dBm) vs. Frequency graph for HLM-20PSM

Rev: A | Copyright © 2025 Marki Microwave LLC.

6

Insertion Loss, Output Power vs. Input Power @ 20GHz graph for HLM-20PSM
Phase Balance (degree) graph for HLM-20PSM

Rev: A | Copyright © 2025 Marki Microwave LLC.

7

Mechanical Data

Rev: A | Copyright © 2025 Marki Microwave LLC.

8

Rev: A | Copyright © 2025 Marki Microwave LLC.

9

Evaluation Board - Outline Drawing

Outline Drawing

Rev: A | Copyright © 2025 Marki Microwave LLC.

10