What is Toko Filter?
Definition of Toko Filter:
Toko filter means a series of standard-specification filters launched by TOKO Co. (株式会社トーコー) in Japan.
TOKO (株式会社トーコー), founded in 1955, is one of Japan's earliest and most representative manufacturers of radio frequency and communication components. Especially in the field of helical filters, TOKO can be said to be the world's first brand to invest in development and successfully mass-produce them. It was once known as "the synonym for Helical Filter" from the 1970s to the 1990s.
With the rapid development of wireless technology, TOKO filters were once one of the most frequently used key components by RF design engineers worldwide and played an important role in various wireless communication devices.
These filters, with their superior performance and stability, supported the early development of the RF industry and had a profound impact on the evolution of subsequent filtering technologies. Therefore, TOKO Filters have become highly representative classic filters in the industry, symbolizing a legacy of high quality and mature technology.
The structure of Toko Filter
TOKO filters are a series of radio frequency filtering products developed based on helical filters as the core technology, designed specifically for high-performance wireless communication systems. Its structure consists of a high-Q spiral coil and a metal shielded cavity, which can achieve excellent frequency selectivity and low insertion loss in a miniaturized size.
In terms of specifications, TOKO filters cover a wide frequency band from 30 MHz to 2.6 GHz, supporting applications such as VHF, UHF, L-Band and low S-Band, and are widely used in radio, base stations, television receiver modules and satellite communication systems.
In terms of specifications, TOKO filters cover a wide frequency band from 230 MHz to 2.6 GHz, supporting applications such as VHF, UHF, L-Band and low S-Band, and are widely used in radio, base stations, television receiver modules and satellite communication systems.
TOKO's early standardized helical filter series (such as the 7HW, 7HT, 5HW, and 5HT series) became the industry standard for helical filters due to their stable performance, repeatable structure, and comprehensive frequency coverage. This established TOKO filters as a benchmark for helical filtering technology in global RF design.
What's special about the TOKO Filter?
TOKO systematically designed the corresponding center frequency (Fc) and bandwidth (BW) for the frequency bands used in the mainstream application fields at the time, and launched a series of standard products that can be used directly to meet the needs of different communication devices.
For example, in radio receiver applications, VHF (88–108 MHz) helical filters are commonly used, with a bandwidth of approximately 10–15 MHz; television receivers and UHF communication modules mostly use the 400–860 MHz band, corresponding to a bandwidth of approximately 20–30 MHz; while satellite communication and microwave link systems use the L-Band (1.2–2.4 GHz) series, with a bandwidth of approximately 40–60 MHz.
Because of their stable performance, consistent quality, and easy availability, engineers could directly select the appropriate specifications, significantly reducing development time and debugging costs. Therefore, TOKO Filters became the most trusted filters in the communications and electronics industry at the time. Even when engineers mention RF filter products, they immediately think of TOKO filters. TOKO was synonymous with filters.
How to buy TOKO Filter?
TOKO filters were once highly representative helical filters in the field of radio frequency and communications, known for their high performance, high stability and easy availability. However, as electronic products increasingly pursue miniaturization, mass production, and surface mount technology (SMD), the traditional helical filter's larger size and more complex assembly no longer meet modern needs.
On the other hand, emerging SAW, DR, and Microstrip Filter technologies offer thinner and lighter packages and automated processes, gradually replacing the market position of traditional TOKO filters. Furthermore, with TOKO's merger into Murata Manufacturing in 2014, the original Helical Filter series was officially discontinued.
Therefore, it is now difficult to purchase a complete series of original TOKO filters on the market. Only some large communication equipment manufacturers are still using existing parts or stock components. Although there is still a large demand in the market, and many engineers still hope to purchase such convenient and stable products, it is almost impossible to purchase directly from TOKO, and it is also difficult to find a stable supply source in mainstream electronic component channels.
TOKO Helical Filter from Temwell
Temwell has over 28 years of professional experience in designing and manufacturing helical filters, serving the global communications, radar, and wireless module industries for many years, and is familiar with the performance characteristics and application differences of various helical structures. With TOKO ceasing production of helical filter products, Temwell has become one of the few professional manufacturers on the market capable of providing complete replacement solutions for TOKO's standard filter series.
Temwell's alternatives cover the TOKO 5H and 7H series, achieving full pin-to-pin compatibility. It can directly replace the original product in terms of size, pin configuration, frequency, and electrical characteristics, and can be implemented without modifying the circuit design. Furthermore, for the TOKO 13H and 19H series, Temwell also offers equivalent or enhanced performance alternatives, ensuring that key performance indicators such as center frequency (Fc), bandwidth (BW), insertion loss (IL), and stopband rejection are consistent with or better than the originals.
To meet the needs of engineers and RF enthusiasts, Temwell has launched an online purchasing platform for its standard Toko Filter series. All products are in stock and support fast shipping within 72 hours. Whether for development testing, system repair, or replacing original TOKO filters, Temwell's standard Toko Filter series provides high-quality, high-stability products instantly. With its extensive selection of filters, reliable components available quickly, and stable quality, the Temwell online Filter Store is the perfect partner for professional engineers and RF enthusiasts.
In addition to standard alternatives, Temwell offers customized design services based on the TOKO series specifications, optimizing for customer frequency requirements, power conditions, and size constraints. With its extensive experience and rapid development capabilities, Temwell can provide design solutions within 3 days and complete sample production within 7 days, helping customers maintain system stability while seamlessly continuing the application design of the TOKO series filters.
Whether you are a student, RF engineer or radio enthusiast, if you are interested in Toko type Alternative Filter, feel free to contact us and get free consultation services so that we can provide you with the best solution.
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