Agilent Technologies 00281-90055 User Manual

R/Q/U/V281A, B
mm-Wave-to-Coax Adapters

26.5 to 65 GHz

Operating Note

Agilent Part Number: 00281-90055
Printed in USA
Print Date: October 2004
Supersedes: January 2004
© Agilent Technologies, Inc. 2000,

2004.

Notice

DOCUMENTATION WARRANTY

THE MATERIAL CONTAINED IN THIS DOCUMENT IS
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R

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ii Agilent R/Q/U/V281A, B Operating Note

In This Manual…

Description, page 1

•

• Specifications, page 3

• Care, Connection and Torque, page 5

Assistance Product maintenance agreements and other customer assistance agreements

are available for Agilent Technologies products.
For assistance, contact Agilent Technologies (refer to “Contacting Agilent”

on page iv).

Agilent R/Q/U/V281A, B Operating Note iii

Contacting Agilent

Online assistance: www.agilent.com/find/assist

Americas

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iv Agilent R/Q/U/V281A, B Operating Note

Safety and Regulatory Information

Review this product and related documentation to familiarize yourself with
safety markings and instructions before you operate the instrument. This
product has been designed and tested in accordance with international
standards.

WARNING The WARNING notice denotes a hazard. It calls attention to a procedure,

practice, or the like, that, if not correctly performed or adhered to, could result
in personal injury. Do not proceed beyond a WARNING notice until the
indicated conditions are fully understood and met.

CAUTION The CAUTION notice denotes a hazard. It calls attention to an operating

procedure, practice, or th e like, whic h, if not cor rect ly performed or adhered
to, could result in damage to the product or loss of important data. Do not
proceed beyond a CAUTION notice until the indicated conditions are fully
understood and met.

Agilent R/Q/U/V281A, B Operating Note v

Instrument Markings

When you see this symbol on your instrument, you should refer to the instrument’s
instruction manual for important information.

!

This symbol indicates hazardous voltages.

The laser radiation symbol is marked on products that have a laser output.

This symbol indicates that the instrument requires alternating current (ac) input.

The CE mark is a registered trademark of the European Community. If it is
accompanied by a year, it indicates the year the design was proven.

The CSA mark is a registered trademark of the Canadian Standards Association.

1SM1-A This text indicates that the instrument is an Industrial Scientific and Medical Group 1

Class A product (CISPER 11, Clause 4).
This symbol indicates that the power line switch is ON.

This symbol indicates that the power line switch is OFF or in STANDBY position.

vi Agilent R/Q/U/V281A, B Operating Note

Description

The Agilent R/Q/U/V 281 adapters have:

• Excellent repeatability

• Measurement v ersatility

• WR-28, WR-22, WR-19, WR-15 (R, Q, U, V band) waveguide

• Precision 1.85 mm and 2.4 mm coax connectors

Increased Measurement

Versatility

Excellent Accuracy Low SWR transitions reduce mismatch uncertainty and excellent

Coax measurements to 65 GHz. The Agilent 281 family of precision
millimeter waveguide-to-coax adapters offers a simple, low SWR transition
between transmission media. Take advantage of stable, low loss and low
SWR waveguide when measuring coaxial devices at higher frequencies. Or
keep the convenience of coax, even when testing waveguide components.
Agilent R/Q/U/V 281 adapters increase the versatility of existing test sets to
measure both coax and waveguide components.

repeatability ens ures consistent measurements. Available with both male and
female connectors, these adapters help microwave engineers combine the
best test components from each transmission media. With the Agilent
R/Q/C1/V 281 adapters, engineers can balance the merits of coax and
waveguide to achie ve the bes t combinat ion of ac curacy, cost and ease-of-use.

Agilent R/Q/U/V281A,B Operating Note 1

Dimensions

Description

A=19.3 mm (R281)
A=28.7 mm (Q281)
A=28.7 mm (U281)

Figure 1 Dimensions in millimeters

2 Agilent R/Q/U/V281A,B Operating Note

Specifications

Specifications

Specifications describe the instrument’s warranted performance over the
temperature range 0 to 55
Characteristics ar e typi cal but non-war rante d performanc e pa rameter s. They
are denoted as “typical”, “nominal”, or “approximate”.

Coax-to-Waveguide Adapters Supplemental Characteristics
Model Coax Connector

Type

R281A 2.4 mm (female) WR-28 26.5 to 40 ≥24 dB ≤0.3 dB ≥ −50 dB
R281B 2.4 mm (male) WR-28 26.5 to 40 ≥24 dB ≤0.3 dB ≥ −50 dB
Q281A 2.4 mm (female) WR-22 33 to 50 ≥22 dB ≤0.3 dB ≥ −50 dB

Waveguide
Number

Frequency
(GHz)

°C (except where noted). The Supplemental

1

Return Loss

Insertion Loss2Repeatability

Typically Better
Than:

1,3

Q281B 2.4 mm (male) WR-22 33 to 50 ≥22 dB ≤0.3 dB ≥ −50 dB
U281A 1.85 mm (female) WR-19 40 to 60 ≥22 dB

U281B 1.85 mm (male) WR-19 40 to 60 ≥22 dB
V281A 1.85 mm (female) WR-15 50 to 67

67 to 70

V281B 1.85 mm (male) WR-15 50 to 67

67 to 70

1. At the coaxial port only.

2. Typical maximum insertion loss for single adapter.

3. Repeatability = 20 Log
disconnect/connect cycle. Repeatability depend upon proper torque and pin-depth.

4. Typical for single adapter. Mated pair return loss warranted to ≥18 dB.

|∆Γ| where |∆Γ| =|Γm1–Γm2|. This is the difference between two measurements Γm

≥20 dB
≥20 dB (typical)

≥20 dB
≥20 dB (typical)

4

4

≤0.5 dB ≥ −50 dB

≤0.5 dB ≥ −50 dB
≤0.5 dB

≤0.5 dB
≤0.5 dB

≤0.5 dB

, and Γm2 before and after one

1

≥ −50 dB
≥ −50 dB

≥ −50 dB
≥ −50 dB

Agilent R/Q/U/V281A,B Operating Note 3

Specifications

Environment Non-operating environmental specifications apply to storage and shipment.

Products should be stored in a clean, dry environment. Operating
environmental specifications apply when the product is in use.

Characteristic Non-Operating Operating

Temperature –55 to +75 °C 0 to +55 °C
Humidity <95% relative at +40 °C <95% relative at +40 °C
Altitude ≤15,300 m (50,000 ft) <4,600 m (15,000 ft)

NOTE Storage or operation within an environment other than that specified above

may cause damage to the product and may void the warranty.

4 Agilent R/Q/U/V281A,B Operating Note

Connector Torque and Pin Depth

Care, Connection and Torque

Care, Connection and Torque

Connector
Type

1.85 mm 8 lb-in

2.4 mm 8 lb-in

Torque
(±0.5 lb-in)

(90 N-cm)

(90 N-cm)

Torque Wrench Part
Number

1250-1863 U281: 0 to 0.03 mm

1250-1863 0 to 0.038 mm

Mating 2.4 mm connectors with 1.85 mm connectors

Connector Pin Depth
(male or female)

(0 to 0.0012 in)

V281: 0 to 0.0152 mm

(0 to 0.0006 in)

(0 to 0.0015 in)

Protection Gage Kit
Part Number

85056-60018 (male)
85056-60017 (female)

11752-60108 (male)
11752-60107 (female)

End Cap Part Number

1401-0202 (female)
1401-0095 (male)

1401-0202 (female)
1401-0095 (male)

The 1.85 mm coaxial end of the Agilent U/V281AB adapters can be mated
with 2.4 mm connectors.

Agilent R/Q/U/V281A,B Operating Note 5

Care, Connection and Torque

6 Agilent R/Q/U/V281A,B Operating Note