Product Range | RF Connectors, Adapters, Terminations & Microwave Components

Connectors Adapters Terminations Attenuators DC Blocks Waveguide Transitions Insulators Isolators Cable Assemblies

01 — Coaxial connectors

RF Coaxial Connectors

Precision 50 Ω coaxial connectors in male and female configurations, covering standard, miniature and millimeter-wave interfaces. Available in straight, right-angle, bulkhead, flange and panel-mount styles with solder, crimp or PCB attachment.

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Full interface coverage

N, TNC, TNC-A, BNC, BMA, SMA, SSMA, SMP, APC-7, 3.5 mm, 2.92 mm, 2.4 mm, 1.85 mm and 1.0 mm series.

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Materials

Stainless steel passivated or brass with gold-plated center conductors and PTFE dielectric as standard.

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Mounting options

Straight, right-angle, 2-hole and 4-hole flange, bulkhead and PCB surface mount.

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Temperature range

Operating range −55 °C to +125 °C for demanding environments.

Series	Frequency	Impedance	Coupling	Typical use
N	DC – 18 GHz	50 Ω	Threaded	Rugged outdoor & general RF systems
TNC	DC – 18 GHz	50 Ω	Threaded	High-vibration environments
TNC-A	DC – 18 GHz	50 Ω	Threaded	Improved-reliability variants
BNC	DC – 4 GHz	50 / 75 Ω	Bayonet	Instrumentation & video
SMA	DC – 27 GHz	50 Ω	Threaded	Sub-miniature, high-density RF
SSMA	DC – 40 GHz	50 Ω	Threaded	Compact microwave assemblies
SMP	DC – 40 GHz	50 Ω	Snap-on	Board-to-board blind mate
BMA	DC – 18 GHz	50 Ω	Slide-on	Rack & panel blind mate
APC-7	DC – 18 GHz	50 Ω	Sexless	Metrology & calibration
3.5 mm	DC – 33 GHz	50 Ω	Threaded	Precision laboratory measurement
2.92 mm	DC – 40 GHz	50 Ω	Threaded	Precision test to 40 GHz
2.4 mm	DC – 50 GHz	50 Ω	Threaded	Millimeter-wave instruments
1.85 mm	DC – 65 GHz	50 Ω	Threaded	Millimeter-wave test & systems
1.0 mm	DC – 110 GHz	50 Ω	Threaded	Highest-frequency measurement

Model nomenclature

Our connector part numbers follow a structured code, so you can identify the interface, polarity and mounting style directly from the model number.

Code block	Meaning	Available options
D _ _	Port type	34 = N · 36 = 2.92 mm · 37 = 2.4 mm · 38 = 1.85 mm · 39 = 1.0 mm · 54 = TNC-A · 55 = SMA · 57 = SSMA · 63 = SMP
D _ polarity	Port polarity	0 = Jack (female) · 1 = Plug (male) · N = genderless
D _ _ M	Mounting style	S = detachable · M = metal bulkhead · P = dielectric bulkhead · D = airline bulkhead · T = direct-mount · B = PCB solder · L = end-launch
D _ _ _ C	Coupling style	F = flange mount · Y = threaded mount · H = PCB vertical solder · E = PCB edge solder
… F01–F13	Flange specification	Standard flange patterns F01 to F13 (dimensions available on request)

Example: D55 0 S … F01 decodes as an SMA jack (female), detachable mounting, flange type F01 connector. Tell us the interface, polarity and mounting you need and we will confirm the exact part number.

02 — Coaxial adapters

Adapters

In-series and between-series adapters for laboratory benches, production test stations and system integration. Precision construction maintains impedance continuity and low VSWR across the full operating band.

In-series adapters

Male-to-male, female-to-female, right-angle and tee configurations within a single interface family. Ideal for extending test leads and protecting instrument ports.

Between-series adapters

Cross-interface adapters such as N-to-SMA, 2.92 mm-to-2.4 mm, 3.5 mm-to-2.92 mm and APC-7-to-N, covering the common laboratory transitions.

Configuration	Typical combinations	Frequency	Style
In-series, straight	SMA-KK, SMA-JJ, N-KK, N-JJ	DC – 27 GHz	Straight barrel
In-series, right-angle	SMA-KWK, SMA-JWJ, N-KWK	DC – 18 GHz	90° body
N to SMA	N/SMA-KK, N/SMA-JK, N/SMA-JJ	DC – 18 GHz	Straight / bulkhead
N to 3.5 mm	N/3.5-KK, N/3.5-JK	DC – 18 GHz	Straight
N to 2.92 mm	N/2.92-KK, N/2.92-JK	DC – 18 GHz	Straight
3.5 mm to 2.92 mm	3.5/2.92-KK, 3.5/2.92-JK	DC – 33 GHz	Straight, precision
2.92 mm to 2.4 mm	2.92/2.4-KK, 2.92/2.4-JK	DC – 40 GHz	Straight, precision
2.4 mm to 1.85 mm	2.4/1.85-KK, 2.4/1.85-JK	DC – 50 GHz	Straight, precision
1.85 mm to 1.0 mm	1.85/1.0-KK, 1.85/1.0-JK	DC – 65 GHz	Straight, precision
BNC to SMA	BNC/SMA-KK, BNC/SMA-JK	DC – 4 GHz	Straight
TNC to SMA	TNC/SMA-KK, TNC/SMA-JK	DC – 11 GHz	Straight
APC-7 to N	APC7/N-KK, APC7/N-JK	DC – 18 GHz	Straight, precision

Part-number convention: within a model code, K denotes a jack (female) interface, J a plug (male) interface, and W a right-angle body. Tell us the interfaces you need and we will confirm the matching part number.

03 — Terminations & loads

Terminations & Loads

Coaxial terminations provide a matched 50 Ω load for unused ports, protecting sources and preserving measurement accuracy. Available across the common interface families, from precision laboratory loads to medium-power units.

Type	Interfaces	Frequency	Power	Typical VSWR
Precision termination	2.4 mm, 2.92 mm, 3.5 mm	DC – 50 GHz	0.5 – 1 W	< 1.15:1
Precision termination	1.85 mm, 1.0 mm	DC – 110 GHz	0.5 – 1 W	< 1.35:1
Standard termination	SMA	DC – 18 GHz	1 – 2 W	< 1.20:1
Standard termination	N	DC – 18 GHz	2 – 5 W	< 1.20:1
Medium-power load	N, TNC	DC – 12.4 GHz	10 – 50 W	< 1.30:1
Economy termination	BNC	DC – 4 GHz	1 W	< 1.25:1

Selection note: choose power handling above your expected average power with margin, and select the connector interface that matches your instrument port. When in doubt, send us your operating conditions and we will recommend a part.

04 — Fixed attenuators

Fixed Attenuators

Coaxial fixed attenuators reduce signal level by a precise, repeatable amount. Commonly used to protect instrument inputs, extend dynamic range and match power levels. Attenuation values from 1 dB to 40 dB.

Part-number series	Interfaces	Frequency	Values	Power
A5510 series	SMA (m) to SMA (f)	DC – 18 GHz	3 / 6 / 10 / 20 / 30 dB	2 W
A3510 series	3.5 mm (m) to 3.5 mm (f)	DC – 26.5 GHz	3 / 6 / 10 / 20 / 30 dB	2 W
A3610 series	2.92 mm (m) to 2.92 mm (f)	DC – 40 GHz	3 / 6 / 10 / 20 / 30 dB	2 W
A3710 series	2.4 mm (m) to 2.4 mm (f)	DC – 50 GHz	3 / 6 / 10 / 20 / 30 dB	2 W
N-series	N (m) to N (f)	DC – 18 GHz	3 / 6 / 10 / 20 / 30 dB	5 – 50 W

Decoding the part number: the dB value is the final two digits — L03 = 3 dB, L06 = 6 dB, L10 = 10 dB, L20 = 20 dB, L30 = 30 dB. Example: A3610P1L20 is a 2.92 mm 20 dB attenuator.

05 — DC blocks

DC Blocks

A DC block inserts a capacitor in the RF path, isolating DC while passing the RF signal. Used to protect sensitive instruments from DC bias, separate DC and RF paths, and supply bias without disturbing the RF circuit.

Inner DC block

Blocks DC on the center conductor. The most common type, used to protect spectrum analysers and receivers from DC on the inner conductor.

Outer DC block

Blocks DC on the outer conductor. Used where ground-loop isolation or floating screen conditions are required.

Type	Interfaces	Frequency	Blocking voltage	Typical insertion loss
Inner DC block	SMA (m) – SMA (f)	0.01 – 18 GHz	50 V DC	≤ 0.6 dB
Inner DC block	N (m) – N (f)	0.01 – 8 GHz	50 V DC	≤ 0.7 dB
Inner DC block	BNC (m) – BNC (f)	0.001 – 3 GHz	50 V DC	≤ 0.5 dB
Inner DC block	2.92 mm (m) – 2.92 mm (f)	0.01 – 40 GHz	50 V DC	≤ 0.8 dB
Outer DC block	SMA (m) – SMA (f)	0.01 – 18 GHz	50 V DC	≤ 0.7 dB
Outer DC block	N (m) – N (f)	0.01 – 8 GHz	50 V DC	≤ 0.8 dB

06 — Waveguide transitions

Waveguide-to-Coaxial Transitions

Waveguide-to-coaxial adapters convert between rectangular waveguide and coaxial line, allowing millimeter-wave waveguide components to be connected to coaxial test equipment and instruments.

Waveguide band	Coaxial interface	Frequency range	Typical VSWR	Insertion loss
WR-28 (Ka)	2.92 mm (m/f)	26.5 – 40 GHz	1.25:1 max	0.4 dB max
WR-22 (Q)	2.4 mm (m/f)	33 – 50 GHz	1.30:1 max	0.5 dB max
WR-15 (V)	1.85 mm (m/f)	50 – 75 GHz	1.35:1 max	0.5 dB max
WR-12 (E)	1.0 mm (m/f)	60 – 90 GHz	1.35:1 max	0.5 dB max
WR-10 (W)	1.0 mm (m/f)	75 – 110 GHz	1.40:1 max	0.6 dB max

Materials: connector outer conductor in stainless steel, passivated; center conductor in beryllium copper, gold plated; waveguide body in brass, gold plated. Operating temperature −55 °C to +125 °C.

07 — Feedthrough insulators

Feedthrough Insulators

Single-pin and multi-pin RF feedthrough insulators provide a sealed, impedance-controlled transition through a package wall, carrying RF or DC into microwave modules and hermetic packages.

Type	Frequency range	Pin diameter	Pin configuration
Single-pin feedthrough	DC – 8 GHz	0.23 mm (0.009")	ST – ST
Single-pin feedthrough	DC – 18 GHz	0.30 mm (0.012")	ST – ST
Single-pin feedthrough	DC – 28 GHz	0.38 mm (0.015")	ST / RD
Single-pin feedthrough	DC – 46 GHz	0.45 mm (0.018")	ST / RD
Single-pin feedthrough	DC – 73 GHz	0.46 – 0.51 mm	ST / RD
Multi-pin feedthrough	DC – 18 GHz	0.30 – 0.51 mm	2 – 8 pin arrays

Pin types: ST = straight pin, RD = round-head pin. Combinations such as ST–ST, ST–RD and RD–RD are available. Multi-pin arrays are configured to customer requirement.

08 — Ferrite components

Isolators & Circulators

Ferrite isolators and circulators provide non-reciprocal signal routing. Isolators protect sources from reflected power; circulators route signals between three ports for duplexing and switching applications.

Product	Format	Frequency	Typical isolation	Typical insertion loss
Coaxial isolator	SMA, N	1 – 18 GHz	≥ 18 dB	≤ 0.5 dB
Coaxial circulator	SMA, N	1 – 18 GHz	≥ 18 dB	≤ 0.5 dB
Drop-in isolator	Surface mount	2 – 18 GHz	≥ 20 dB	≤ 0.4 dB
Waveguide isolator	WR-series	18 – 40 GHz	≥ 20 dB	≤ 0.4 dB

Availability: isolator and circulator specifications vary considerably by band and power level. Please send your frequency band and power requirement for a specific recommendation.

09 — Cable assemblies

Cable Assemblies

Custom coaxial cable assemblies built to drawing or to your electrical requirement — with controlled electrical length, defined connector combinations and tested performance.

Semi-rigid assemblies

Formable semi-rigid cable with hand-formed bends, providing stable electrical performance and excellent shielding in fixed installations.

Flexible assemblies

Flexible coaxial cable assemblies for applications requiring repeated movement or simplified routing.

Test-grade assemblies

Low-loss, phase-stable assemblies for VNA and bench measurement, with precision connectors on both ends.

To quote a cable assembly we need: connector types at each end, cable type or diameter, overall length, and any electrical or environmental requirement. Send us a drawing or a description and we will confirm.

Looking for a specific part number?

Our catalog is extensive and only part of it is listed here. Send us the part number, interface combination or specification you need and we will confirm availability and price.

sales@northrf.com Send a detailed enquiry

RF & microwave components, DC to 110 GHz

RF Coaxial Connectors

Full interface coverage

Materials

Mounting options

Temperature range

Model nomenclature

Adapters

In-series adapters

Between-series adapters

Terminations & Loads

Fixed Attenuators

DC Blocks

Inner DC block

Outer DC block

Waveguide-to-Coaxial Transitions

Feedthrough Insulators

Isolators & Circulators

Cable Assemblies

Semi-rigid assemblies

Flexible assemblies

Test-grade assemblies

Looking for a specific part number?