Band1 BAW Duplexer

Description YTLD1950A is a high performance duplexer

designed for base station applications in Band1

(1920~1980 MHz UL, 2110~2170 MHz DL).

YTLD1950A is designed with ROFS’s MEMS BAW

technology, which provides high-Q resonator.

Therefore provides low insertion loss and low

return loss to decrease loss at DL passband.

Meanwhile has high out-of-band attenuation to

assure high sensitivity at UL passband.

YTLD1950A uses chip scale packaging (CSP)

technology to assembly the filters into a molded

chip-on-board module with the footprint of 2.5mm

x 2.0mm and height of 0.81mm.

Features Miniature Size

2.5 x 2.0 x 0.81mm

Insertion Loss:

o UL: 2.2 dB Typ.

o DL: 2.1 dB Typ.

Tx-RX Isolation:

o UL: 60 dB Typ.

o DL: 65 dB Typ.

Tx Input Power o TBD

ESD protection ability：TBD

Moisture Sensitivity: MSL3

Storage Temperature：-40 to +95 ℃

Environmental Full implement with RoHS compliant

Lead Free (Pb free)

8 Pin 2.5 x 2.0 x 0.81mm Package

Functional Block Diagram（Top Thru View）

Reference Des. Value Description

R1 50ohm

R2 50ohm

R3 50ohm

L1 2.4 nH Recommended Inductor

L2 7.5 nH Recommended Inductor

L3 6.2 nH Recommended Inductor

Pin Connection

No. Function

1 DownLink

3 UpLink

6 Ant

2,4,5,7,8,9 Ground

7 6 5

8

1

9 4

3

L3R3

DL

L1 R1

Ant

UL

L2 R2

2

Band1 BAW Duplexer

Electrical Specification

Uplink Passband (1920~1980MHz)

Parameter (Operation Temperature: -40~95℃) Min(1) Typ(1) Max(1) Unit

Insertion Loss (1920~1980MHz) / 2.2 2.5 dB

Ripple(1920~1980MHz) / 0.7 1.0 dB

VSWR (1920~1980MHz,ANT Port) / 1.3 1.3 /

VSWR (1920~1980MHz,UPLINK Port) / 1.3 1.3 /

Absolute Attenuation(0~8000MHz)

(10~1800 MHz) 46 46 / dB

(1785~1880 MHz) 46 46 / dB

(1880~1903 MHz) 10 16 / dB

(1997~2110 MHz) 6 11 / dB

(2110~2175 MHz) 57 57 / dB

(2255~2500 MHz) 51 51 / dB

(2500~3840 MHz) 41 41 / dB

(3840~5000 MHz) 41 41 / dB

(5000~5940 MHz) 38 38 / dB

Downlink Passband(2110~2170MHz)

Parameter (Operation Temperature: -40~95℃) Min(1) Typ(1) Max(1) Unit

Insertion Loss (2110~2170MHz) / 2.1 2.3 dB

Ripple(2110~2170MHz) / 0.7 0.9 dB

VSWR(2110~2170MHz, ANT Port) / 1.3 1.3 /

VSWR (2110~2170MHz, DOWNLINK Port) / 1.3 1.3 /

Absolute Attenuation(0~8000MHz)

(10~1920 MHz) 48 48 / dB

(1916.8~1985 MHz) 53 53 / dB

(2246.8~2400 MHz) 61 61 / dB

(2500~3000 MHz) 50 50 / dB

(3000~3800 MHz) 46 46 / dB

(3800~4220 MHz) 46 46 / dB

(4340~5000 MHz) 46 46 / dB

Parameter(Operation Temperature: -40~95℃) Min(1) Typ(1) Max(1) Unit

Isolation

1920~1980MHz 60 60 / dB

2110~2170MHz 65 65 / dB

(1)Max or Min value at -40℃~95℃；Typical value at 25±3 ℃

YTLD1950A Band1 BAW Duplexer

Typical Performance at Tc=25℃

Figure1. UPLINK Passband

Figure3. UPLINK

Figure5. UPLINK Wideband

Figure2. DOWNLINK Passband

Figure4. DOWNLINK

Figure6. DOWNLINK Wideband

YTLD1950A Band1 BAW Duplexer

Typical Performance at Tc=25℃

Figure7. UPLINK - DOWNLINK Isolation

Figure9. Uplink Return Loss

Figure11. Uplink Smith Chart

Figure8. Ant Return Loss

Figure10. DOWNLINK Return Loss

Figure12. DOWNLINK Smith Chart

YTLD1950A Band1 BAW Duplexer

Figure13. Ant Port Smith Chart

YTLD1950A Band1 BAW Duplexer

Package Outline

Top View Side View Bottom View

Note:

1. Dimension: mm

2. Dimensions nominal unless otherwise noted

3. Contact area are gold plated

4. Pad(1)(2) is single size, others are same size

5. J1950 is product code

Order Information

No. Function

1 DownLink

3 UpLink

6 Ant

2,4,5,7,8,9 Ground

P/N Qty/Reel Container

YTLD1950A 3000 7 inch Reel

YTLD1950A Band1 BAW Duplexer

Packing

1. Tape Dimension

2. Reel Dimension

3000Pcs/Reel

Dimension(mm)

E 1.75±0.10F 3.50±0.05P2 2.0±0.1D 1.55±0.05D1 1.0MINP0 4.0±0.110P0 40.0±0.20W 8.00±0.3P 4.0±0.1A0 2.25±0.05B0 2.80±0.05K0 1.10±0.10t 0.30±0.05

YTLD1950A Band1 BAW Duplexer

Recommended Reflow Profile