Richardson Electronics and Junkosha Sign Distribution Agreement

Agreement includes Americas and Europe

LaFox, IL, Friday, March 2, 2018 – Richardson Electronics, Ltd. (NASDAQ: RELL) announced today a new distribution agreement with Junkosha USA, Inc., a leading manufacturer of high quality, ultra-high performance microwave cable assemblies. The agreement aligns with both companies’ commitment to providing unsurpassed value to customers.

Richardson Electronics is a global channel partner for RF and microwave components, power electronics, and world-class electron devices. As a global company, Richardson Electronics provides solutions and add value through design-in support, systems integration, prototype design and manufacturing, testing, logistics, and aftermarket technical service and repair.

“Since its inception, Junkosha’s innovative outlook has driven the company’s history of disruptive technologies and products,” said Greg Peloquin, Executive Vice President of Richardson Electronics’ Power & Microwave Technologies group. “We look forward to bringing their ultra-high performance microwave cable assemblies to our customers in the Americas and Europe.”

Established in Japan in 1954, Junkosha’s products and technologies have been used in a wide range of applications, with exceptional advances in the wireless communication and telecommunications fields. In response to the development of advanced microwave and millimeter wave communication systems, Junkosha manufactures Phase Stable and Phase Matched microwave cable assemblies for applications up to 120GHz that provide outstanding reliability and performance that endures.

“Richardson Electronics’ established infrastructure and global sales and support teams make them a key partner for us as we look to expand sales in new territories,” stated Joe Rowan, President of Junkosha USA. “We look forward to a successful partnership.”

About Richardson Electronics, Ltd.

Richardson Electronics, Ltd. is a leading global provider of engineered solutions, power grid and microwave tubes and related consumables; power conversion and RF and microwave components, flat panel detector solutions and replacement parts for diagnostic imaging equipment; and customized display solutions. We serve customers in the alternative energy, healthcare, aviation, broadcast, communications, industrial, marine, medical, military, scientific and semiconductor markets. The Company’s strategy is to provide specialized technical expertise and “engineered solutions” based on our core engineering and manufacturing capabilities. The Company provides solutions and adds value through design-in support, systems integration, prototype design and manufacturing, testing, logistics, and aftermarket technical service and repair through its global infrastructure. More information is available at www.rell.com.

Richardson Electronics common stock trades on the NASDAQ Global Select Market under the ticker symbol RELL.

About Richardson Electronics – Power & Microwave Technologies

For 70 years, Richardson Electronics has been your industry-leading global provider of engineered solutions, RF & microwave and power products. With the launch of the Power & Microwave Technologies group, we continue this legacy and complement it with new products from the world’s most innovative technology partners. Richardson Electronics’ Power & Microwave Technologies group focuses on what we do best: identify and design disruptive technologies, introduce new products on a global basis, develop solutions for our customers, and provide exceptional worldwide support. As a global company, we provide solutions and add value through design-in support, systems integration, prototype design and manufacturing, testing, logistics, and aftermarket technical service and repair—all through our existing global infrastructure. More information is available at: www.rellpower.com.

About Junkosha USA, Inc.

Junkosha is known for its high-performance, phase-stable cables and cable assemblies to 110 GHz. With over 60 years of industry-leading experience, as well as all manufacturing in Japan, Junkosha effectively and proactively solves customers’ problems with fast responses, including typical delivery time within less than 2 weeks and ultra-high quality, high-performance, and high-durability products. In addition to their industry leads, Junkosha is known for making custom fluoropolymer (Teflon) dielectrics for the highest performance, and have such strong, established quality control that they have only seen 1 defective assembly in 3 years of shipments. More information is available at www.junkosha.co.jp.