RS Microwave Company, Inc.

United States

PN 03331C series comprises a set of high power low loss filters with wide passband and wide stopband. The filters passbands are contiguous to each other so as to cover a wide frequency spectrum ranging from 900 MHz up to 18 GHz. Each filter has 40-50% fractional bandwidth and provides more than 40 dB rejection for the second and third harmonics of the passband frequencies. Of particular interest is the performance of the highest frequency filter, namely 03331C-4: this extremely compact filter can handle 150 W CW of power in a passband between 12 and 18 GHz, while providing more than 40 dB rejection from 24 GHz to 54 GHz. Such performance is achieved by employing the latest advanced design techniques developed at RS Microwave.

TRAK Microwave Switched Filter Banks typically include the integration of multiple filter topologies with PIN diode and MMIC switch sub-circuits to achieve operational bandwidths of greater than 3 octaves. Filter topologies include lumped element filters up to 6 GHz and distributed and cavity filter designs up to 20 GHz. Hybrid packaging allows for extremely small sizes, as exemplified by our SP5T switch with outline dimensions of 2.3" X 1.4" X.265".

PN 20441CD is a very low loss Ku-Band diplexer employing high Q-factor cavities. The diplexer response is pseudoelliptic, thus yielding high channel isolation while still achieving maximum passband width and superior insertion loss performance.

The filter passband extends up to 30 MHz, where less than 0.5 dB insertion loss is guaranteed. Thanks to the pseudoelliptic nature of this complex design, an extreme close-in rejection of 70 dBc is provided at 37 MHz, which is only 5 MHz away from the upper edge of the passband. The usage of hybrid technologies allows the stopband to extend up to 3600 MHz. This unit has been properly designed so as to withstand 500 W of continuous power at its input port (all power testing has been conducted at RS Microwave). PN 41922C-1 is manufactured according to RS Microwave quality standards to withstand the harsh environmental conditions of military avionics applications.

RS Microwave has been manufacturing power amplifiers encompassing the RF frequency range 10 MHz to 5 GHz, since 1991. We have developed these KW power level amplifiers for our exclusive in-house use. These rugged amplifiers are used to production-test filters in various operating environments, including temperature-altitude and thermal vacuum. Unconditional stability is standard, with reliable operation over thousands of hours as required in a production environment. RS Microwave production filters are fully tested to meet all specifications, thus ensuring that filters specified at high power will never be returned due to high-power failures. High power testing guarantees no field failures. We are now making these amplifiers available to others wishing to perform reliable and cost-effective RF power tests.

PN 30281C-1 and 30281C-2 are unique K- and Ku-band filters with extremely narrow passband (less than 0.025%) and wide spurious free stopband (up to 50 GHz). Such a distinctive performance is accomplished by properly combining overmoded cavities with single-mode and evanescent mode cavities. RS Microwave manufacturing experience and technological expedients are crucial to obtain excellent mechanical and thermal stability for these innovative products implementing such extreme filtering functions.

PN 53681C is a 5-channel multiplexer designed and built for satellite application. Rugged and light weight, it has 5 passbands covering UHF to S-band - a 10:1 frequency range; but, the concept is adaptable to applications allowing for additional channels of differing widths. The design combines evanescent mode filters and high Q-factor lumped components into a pseudo-elliptic complementary combining network, resulting in low-losshigh-isolation performance with wide, spurious-free stop bands and high power capability.

PN 20521CT is a very compact and low loss triplexer suitable for data-link applications in L-, S-, and C-band. The unit involves pseudoelliptic filters, thus yielding high channel isolation while still achieving maximum passband width for optimum insertion loss performance. The spurious free stopband of this unit extends up to 16 GHz, so as to provide high isolation to other commonly used frequency channels in Ku-band (see our PN 20441CD).

This PN 61703B-3 is the latest in the RS Microwave Band Rejection filter designed for resolving cosite interference problem with the JTIDSMIDS Band. This filter has very steep transition slopes from passband to stopband (6 MHz is typical.). The unit is constructed as an elliptic air-slab line design, achieving high unloaded Q, which minimizes the insertion loss while maximizing the stopband attenuation.