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Using RF Technology for Counter-UAS

Using RF Technology for Counter-UAS

Home » Media Center » Blog » Using RF Technology for Counter-UASIn a previous post, we introduced unmanned aerial vehicles (UAV) and unmanned aircraft systems (UAS). In another post, we explored some of the opportunities and challenges facing unmanned operations in...

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A Closer Look at Horn Antennas

A Closer Look at Horn Antennas

In a previous post, we introduced the history behind the horn antenna. In this post, we talk more about the horn antenna’s design, as well as what makes it so versatile. Horn antennas are named for their horn-like shape and come in a variety of designs.

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10 Factors that Affect Antenna Performance

10 Factors that Affect Antenna Performance

We get a lot of inquiries regarding antenna performance in various settings, one of them being, “how far will the antenna propagate?” In this post, we describe some of the many factors that affect antenna performance.

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Living Legends: James West and Jesse Russell

Living Legends: James West and Jesse Russell

Every February, JEM Engineering honors the the African American Engineers who have made lasting contributions in STEM. This year, we’re excited to spotlight two living legends: James Edward West and Jesse Eugene Russell.

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Blade Antennas & Their Advantages

Blade Antennas & Their Advantages

In a previous post, we introduced blade antennas in relation to flight qualified antennas. In this post, we elaborate on what blade antennas are, as well as their advantages.

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An Introduction to Radar Antennas

An Introduction to Radar Antennas

Radar systems have a wide range of applications, including weather forecasting, traffic control, navigation, automotive systems, and aviation. In military and defense operations, a radar system can be used to detect, track, and identify objects in the air, on land, and at sea.

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The Role of Antennas in ISR

The Role of Antennas in ISR

ISR stands for “intelligence, surveillance and reconnaissance.”

Intelligence is a broad term that refers to information gathering. Surveillance refers to closely observing a target itself, while reconnaissance mostly refers to a preliminary survey of an area to gain information.

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Introduction to RF Filters

Introduction to RF Filters

Home » Media Center » Blog » Introduction to RF FiltersA radiofrequency filter is a component that improves the performance of an antenna by allowing it to be more precise with which signals it receives. In this post, we briefly introduce RF filtering, as well as...

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Improving Antenna Performance with RFoF

Improving Antenna Performance with RFoF

RF over fiber, simplified as ‘RFoF,’ is the method of converting a radio wave (RF) into light by modulating the intensity of the light source (typically a laser) with RF signal.

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What is Signal Conditioning?

What is Signal Conditioning?

Signal conditioning is one of the most important components to any sensing system. In this post, we introduce the concept of signal conditioning, as well as give examples of different types of signal conditioners.

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5G and Beyond

5G and Beyond

It’s very likely that you’ve heard the term “5G.” 5G means much more than faster speeds for one’s mobile devices. In this post, we briefly introduce 5G and contextualize the technology’s potential in the defense sector.

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Scaling Unmanned Operations for Defense

Scaling Unmanned Operations for Defense

In this post, we explore some of the opportunities and challenges facing unmanned operations in the defense sector.

Artificial intelligence (AI), which manifests itself in different forms, from website chat boxes to unmanned military operations, is broadly defined as any system or machine that is designed to imitate human intelligence, in order to perform tasks and improve upon itself using the increasing amount of information it collects.

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Black History Month: NASA’s Hidden Figures

Black History Month: NASA’s Hidden Figures

This year for Black History Month, we celebrate Dorothy Vaughan, Katherine Johnson, Mary Jackson, and Christine Darden for their perseverance despite the inequality they faced, and for their distinguished careers at the National Aeronautics and Space Administration (NASA), where they lent their talents to furthering aeronautics and space travel.

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VSWR, Explained

VSWR, Explained

In this post, we explore VSWR in further detail, as a general concept and as it relates to validating antennas.

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SIGINT, ELINT & COMINT

SIGINT, ELINT & COMINT

There are many different types of antenna communications and intelligence gathering disciplines. In this post, we explain the key distinctions between SIGINT, COMINT, and ELINT.

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Anatomy of a Vivaldi Antenna

Anatomy of a Vivaldi Antenna

The Vivaldi antenna, also known as a tapered slot antenna, is a type of linear-polarized planar antenna invented by Peter Gibson in 1978…

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Introduction to the Biconical Antenna

Introduction to the Biconical Antenna

The phrase “biconical antenna” describes a broadband antennas that are made up of two roughly conical conductive objects, that are nearly touching at their points. Because of their configuration, they can also be referred to as “bowtie” or “butterfly” antennas.

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Fractal Antennas, Explained

Fractal Antennas, Explained

While fractals antennas have many complexities that can be discussed at length, in this post, we will examine the basics of fractal antennas.

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What is a Smart Antenna?

What is a Smart Antenna?

The textbook definition of a smart antenna is “an antenna array with digital signal processing algorithms, which identify spatial signatures.” Using these spatial signatures, the smart antenna calculates beamforming vectors, which are then used to track and locate the antenna beam on a mobile or target.

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Advancements in Aerospace Antenna Design

Advancements in Aerospace Antenna Design

With the latest advancements brought upon by more research and development, aerospace antenna design has continued to steer away from traditional manufacturing materials and methods.

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Intro to Antenna Polarization

Intro to Antenna Polarization

The polarization of an antenna is loosely defined as the direction of the electromagnetic fields produced by the antenna as energy radiates away from it.

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Frequency Bands & Applications

Frequency Bands & Applications

The textbook definition of a frequency band is an interval in the frequency domain, delimited by a lower frequency and upper frequency. The International Telecommunication Union has assigned designations to these intervals.

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What are Genetic Antennas?

What are Genetic Antennas?

First appearing in the 1990s, genetic antennas, also known as “evolved antennas,” resemble intricately bent paperclips attached to a radio frequency connector.

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What is Beamforming?

What is Beamforming?

The term beamforming refers to a method of directing a wireless signal towards a specific receiving device, whereas the alternative would be allowing the signal to spread in all directions from a transmitter the way it naturally would.

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Antenna Miniaturization

Antenna Miniaturization

As the phrase suggests, antenna miniaturization is the process of replicating an antenna’s functionality while reducing its physical size.

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An Introduction to Jammers

An Introduction to Jammers

As the name suggests, jamming antennas, (aka jammers) are specifically used to interfere with radio noise or signals. In electronic warfare (EW) these interference are meant to disrupt control of a battle. 

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Antennas: A History

Antennas: A History

In honor of our seventeenth anniversary, we invite you to take a look at some major research developments and trends in antenna history over the past century.

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Honoring Black Engineers

Honoring Black Engineers

JEM Engineering is a minority owned company and in honor of Black History Month we would like to shine light on two Black engineers who have made an impact in the world of engineering.

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STEM with JEM

STEM with JEM

Did you know that National STEM Day falls on the 8th of November each year? That’s because the abbreviation “NOV8” actually stands for “INNOVATE.”

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Reshaping Antenna Design with 3D Printing

Reshaping Antenna Design with 3D Printing

As we discussed in a previous post, before we can manufacture, we must prototype. For this step in the process, we are beginning to explore additive manufacturing, or as it’s more commonly known, 3D printing.

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An Overview of Unmanned Aerial Vehicles — and their Antennas

An Overview of Unmanned Aerial Vehicles — and their Antennas

An unmanned aerial vehicle, or UAV, refer to a vehicle that is able to fly remotely, either with some sort of controller or autonomously. An unmanned aircraft system, or UAS, includes not only the UAV, itself but also the person on the ground controlling the flight, as well as the system in place that connects the two of them.

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An Introduction to RF Testing

An Introduction to RF Testing

RF testing is used to measure a variety of different antenna attributes. In this post, we discus a few ways in which rf testing can help determine if your device is performing the way it should.

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Why I Chose a Career in STEM

Why I Chose a Career in STEM

In celebration of STEM Day (November 8) we asked our CEO, Nancy Lilly, and our Director of Antenna Development, Victor Sanchez, why they decided to pursue a career in STEM, and this is what they said…

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The Makings of a Reliable Antenna

The Makings of a Reliable Antenna

Every product, specialty or off-the-shelf, must be designed, tested, and perfected by a team of experts, so that the end-user can be assured of its reliability. The same applies to antenna design.

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