April 2015
Multilayer Balun
For 4900–5950MHz
HHM1908A1
1.0x0.5mm [EIA 0402]*
* Dimensions Code JIS[EIA]
RF Components
Theproductsinthiscatalogarenotrecommendedfornewdesign
RF Components
• All specifications are subject to change without notice.
• Before using these products, be sure to request the delivery specifications.
20150421 / rf_balun_hhm1908a1_en.fm20150421 / rf_balun_hhm1908a1_en.fm
Multilayer Balun
For 4900–5950MHz
SHAPES AND DIMENSIONS
RECOMMENDED LAND PATTERN
HHM1908A1
Conformity to RoHS Directive
Dimensions in mm
0.10±0.10
0.30±0.10
0.20±0.10
0.50max.1.00±0.05
0.50±0.05
0.12±0.07
1 Unbalanced port
2 Balanced port
3 Balanced port
4 GND
Terminal functions
(1)(
2)
(3)(4)
[Top view]
[Bottom view]
Marking
0.35
Dimensions in mm
0.20
0.30
0.80
0.90
0.20
RoHS Directive Compliant Product: See the following for more details related to RoHS Directive compliant products. http://product.tdk.com/en/environment/rohs/
Theproductsinthiscatalogarenotrecommendedfornewdesign
RF Components
• All specifications are subject to change without notice.
• Before using these products, be sure to request the delivery specifications.
20150421 / rf_balun_hhm1908a1_en.fm20150421 / rf_balun_hhm1908a1_en.fm
HHM1908A1
ELECTRICAL CHARACTERISTICS
TEMPERATURE RANGE
Item Frequency Range
(MHz) Min. Typ. Max.
Unbalanced Port Characteristic Impedance (:) 50 (Nominal)
Balanced Port Characteristic Impedance (:)100 (Nominal)
Return Loss at Unbalanced Port (dB) 4900 to 5950 10 — —
Phase Balance (deg.) 4900 to 5950 170 —190
Amplitude Balance (dB) 4900 to 5950 –2.5 — 2.5
Insertion Loss (dB) 4900 to 5950 — — 0.8
Operating temperature Storage temperature
（°C） （°C）
–40 to +85 –40 to +85
Theproductsinthiscatalogarenotrecommendedfornewdesign
RF Components
• All specifications are subject to change without notice.
• Before using these products, be sure to request the delivery specifications.
20150421 / rf_balun_hhm1908a1_en.fm20150421 / rf_balun_hhm1908a1_en.fm
HHM1908A1
FREQUENCY CHARACTERISTICS
INSERTION LOSS AMPLITUDE BALANCE
RETURN LOSS PHASE BALANCE
4000 4250 52504500 4750 5500 57505000 6000
Frequency(MHz)
5.0
2.0
2.5
3.0
3.5
4.0
4.5
1.5
1.0
0.5
0.0
Insertion Loss(dB)
4000 4250 52504500 4750 5500 57505000 6000
Frequency(MHz)
–5
1
0
–1
–2
–3
–4
2
3
4
5
Amplitude Balance(dB)
40
4000 4250 52504500 4750 5500 57505000 6000
20
25
30
35
15
10
5
0
Return Loss(dB)
Frequency(MHz)
4000 4250 52504500 4750 5500 57505000 6000
Frequency(MHz)
160
180
170
190
200
Phase Balance(deg.)
Theproductsinthiscatalogarenotrecommendedfornewdesign
• All specifications are subject to change without notice.
• Before using these products, be sure to request the delivery specifications.
RECOMMENDED REFLOW PROFILE
t3 : Time within 5°C of actual peak temperature
The maximum number of reflow is 3.
Preheating Soldering
Critical zone (T3 to T4) Peak
Temp. Time Temp. Time Temp. Time
T1 T2 t1 T3 t2 T4 t3
150°C 200°C 60 to 120sec 217°C 60 to 120sec 240 to 260°C 30sec max.
t3
t1
Preheating
t2
Soldering
T3 T3
T4
T2
T1
t: Time
T: Temperature
Peak
6°C/sec
or lower
3°C/sec
or lower
Theproductsinthiscatalogarenotrecommendedfornewdesign
RF Components
• All specifications are subject to change without notice.
• Before using these products, be sure to request the delivery specifications.
20150421 / rf_balun_hhm1908a1_en.fm20150421 / rf_balun_hhm1908a1_en.fm
REMINDERS FOR USING THESE PRODUCTS
Before using these products, be sure to request the delivery specifications.
SAFETY REMINDERS
Please pay sufficient attention to the warnings for safe designing when using these products.
The products listed on this catalog are intended for use in general electronic equipment (AV equipment, telecommunications equipment,
home appliances, amusement equipment, computer equipment, personal equipment, office equipment, measurement equipment,
industrial robots) under a normal operation and use condition.
The products are not designed or warranted to meet the requirements of the applications listed below, whose performance and/or quality
require a more stringent level of safety or reliability, or whose failure, malfunction or trouble could cause serious damage to society, person
or property.
Please understand that we are not responsible for any damage or liability caused by use of the products in any of the applications below
or for any other use exceeding the range or conditions set forth in this catalog.
(1) Aerospace/Aviation equipment
(2) Transportation equipment (cars, electric trains, ships, etc.)
(3) Medical equipment
(4) Power-generation control equipment
(5) Atomic energy-related equipment
(6) Seabed equipment
(7) Transportation control equipment
(8) Public information-processing equipment
(9) Military equipment
(10) Electric heating apparatus, burning equipment
(11) Disaster prevention/crime prevention equipment
(12) Safety equipment
(13) Other applications that are not considered general-purpose
applications
When using this product in general-purpose applications, you are kindly requested to take into consideration securing protection circuit/
equipment or providing backup circuits, etc., to ensure higher safety.
REMINDERS
Theproductsinthiscatalogarenotrecommendedfornewdesign